1. Calculating
Percentages
using a
Calculator
© T Madas

2. Calculator Practice with Percentages
Find 12% of 140
16.8
Find 12.5% of 68
8.5
Find 34% of 185
62.9
Find 17.5% of 240 42
Find 22% of 387
85.14
Find 8.5% of 384
32.64
Find 35% of 96.4
33.74
Find 27.5% of 120 33
Find 72% of 855
615.6
Find 7.2% of 855
61.56
Find 41% of 390
159.9
Find 16.4% of 365
59.86
Find 26% of 307
79.82
Find 1.7% of 300
5.1
Find 9% of 110
9.9
Find 0.5% of 110
0.55
© T Madas

3. Calculator Practice with Percentages
Find 14% of 160
22.4
Find 12.5% of 88 11
Find 35% of 284
99.4
Find 17.5% of 320 56
Find 24% of 749
179.76
Find 8.5% of 384
32.64
Find 45% of 146.4
65.88
Find 27.5% of 360 99
Find 32% of 855
273.6
Find 8.2% of 900
73.8
Find 11% of 930
102.3
Find 18.4% of 565
103.96
Find 36% of 385
138.6
Find 0.5% of 360
1.8
Find 7% of 220
15.4
Find 0.25% of 400 1
© T Madas

4. Test on
Percentages
using a
Calculator
© T Madas

5. Calculator Practice with Percentages
Find 12% of 140
16.8
Find 12.5% of 68
8.5
Find 34% of 185
62.9
Find 17.5% of 240 42
Find 22% of 387
85.14
Find 8.5% of 384
32.64
Find 35% of 96.4
33.74
Find 27.5% of 120 33
Find 72% of 855
615.6
Find 7.2% of 855
61.56
Find 41% of 390
159.9
Find 16.4% of 365
59.86
Find 26% of 307
79.82
Find 1.7% of 300
5.1
Find 9% of 110
9.9
Find 0.5% of 110
0.55
© T Madas

6. Calculator Practice with Percentages
Find 14% of 160
22.4
Find 12.5% of 88 11
Find 35% of 284
99.4
Find 17.5% of 320 56
Find 24% of 749
179.76
Find 8.5% of 384
32.64
Find 45% of 146.4
65.88
Find 27.5% of 360 99
Find 32% of 855
273.6
Find 8.2% of 900
73.8
Find 11% of 930
102.3
Find 18.4% of 565
103.96
Find 36% of 385
138.6
Find 0.5% of 360
1.8
Find 7% of 220
15.4
Find 0.25% of 400 1
© T Madas

7. Calculating
Percentages
using
Multipliers
© T Madas

8. Practice on using Percentage Multipliers
Calculate the following percentages by using multipliers:
35% of 124:
43% of 220:
74% of 350:
13% of 270:
29% of 260:
65% of 480:
5% of 185:
7% of 631:
7.5% of 440:
5.5% of 820:
0.35
0.43
0.74
0.13
0.29
0.65
0.05
0.07
0.075
0.055
x 124 =
x 220 =
x 350 =
x 270 =
x 260 =
x 480 =
x 185 =
x 631 =
x 440 =
x 820 =
43.4
94.6
259
35.1
75.4
312
9.25
44.17 33
45.1
© T Madas

9. Practice on using Percentage Multipliers
Calculate the following percentages by using multipliers:
65% of 144:
13% of 320:
54% of 360:
81% of 670:
8% of 250:
4.5% of 560:
17.5% of 820:
7.3% of 1450:
11.5% of 444:
0.5% of 910:
0.65
0.13
0.54
0.81
0.08
0.045
0.175
0.073
0.115
0.005
x 144 =
x 320 =
x 360 =
x 670 =
x 250 =
x 560 =
x 820 =
x 1450 =
x 444 =
x 910 =
93.6
41.6
194.4
542.7 20
25.2
143.5
105.85
51.06
4.55
© T Madas

10. Practice on using Percentage Multipliers
Find 12% of 140
16.8
Find 34% of 185
62.9
Find 22% of 387
85.14
Find 17.5% of 240 42
Find 35% of 96.4
33.74
Find 8.5% of 384
32.64
Find 72% of 855
615.6
Find 27.5% of 120 33
Find 41% of 390
159.9
Find 7.2% of 855
61.56
Find 26% of 307
79.82
Find 16.4% of 365
59.86
Find 9% of 110
9.9
Find 1.7% of 300
5.1
Find 12.5% of 68
8.5
Find 0.5% of 110
9.9
© T Madas

11. Practice on using Percentage Multipliers
Find 14% of 160
22.4
Find 35% of 284
99.4
Find 24% of 749
179.76
Find 17.5% of 320 56
Find 45% of 146.4
65.88
Find 8.5% of 384
10.71
Find 32% of 855
273.6
Find 27.5% of 360 99
Find 11% of 930
102.3
Find 8.2% of 900
73.8
Find 36% of 385
138.6
Find 18.4% of 565
103.96
Find 7% of 220
15.4
Find 0.5% of 360
1.8
Find 12.5% of 88 11
Find 0.25% of 400 1
© T Madas

12. Test
on calculating
Percentages
using
Multipliers
© T Madas

13. Practice on using Percentage Multipliers
Calculate the following percentages by using multipliers:
35% of 124:
43% of 220:
74% of 350:
13% of 270:
29% of 260:
65% of 480:
5% of 185:
7% of 631:
7.5% of 440:
5.5% of 820:
0.35
0.43
0.74
0.13
0.29
0.65
0.05
0.07
0.075
0.055
x 124 =
x 220 =
x 350 =
x 270 =
x 260 =
x 480 =
x 185 =
x 631 =
x 440 =
x 820 =
43.4
94.6
259
35.1
75.4
312
9.25
44.17 33
45.1
© T Madas

14. Practice on using Percentage Multipliers
Calculate the following percentages by using multipliers:
65% of 144:
13% of 320:
54% of 360:
81% of 670:
8% of 250:
4.5% of 560:
17.5% of 820:
7.3% of 1450:
11.5% of 444:
0.5% of 910:
0.65
0.13
0.54
0.81
0.08
0.045
0.175
0.073
0.115
0.005
x 144 =
x 320 =
x 360 =
x 670 =
x 250 =
x 560 =
x 820 =
x 1450 =
x 444 =
x 910 =
93.6
41.6
194.4
542.7 20
25.2
143.5
105.85
51.06
4.55
© T Madas

15. Practice on using Percentage Multipliers
Find 12% of 140
16.8
Find 34% of 185
62.9
Find 22% of 387
85.14
Find 17.5% of 240 42
Find 35% of 96.4
33.74
Find 8.5% of 384
32.64
Find 72% of 855
615.6
Find 27.5% of 120 33
Find 41% of 390
159.9
Find 7.2% of 855
61.56
Find 26% of 307
79.82
Find 16.4% of 365
59.86
Find 9% of 110
9.9
Find 1.7% of 300
5.1
Find 12.5% of 68
8.5
Find 0.5% of 110
9.9
© T Madas

16. Practice on using Percentage Multipliers
Find 14% of 160
22.4
Find 35% of 284
99.4
Find 24% of 749
179.76
Find 17.5% of 320 56
Find 45% of 146.4
65.88
Find 8.5% of 384
10.71
Find 32% of 855
273.6
Find 27.5% of 360 99
Find 11% of 930
102.3
Find 8.2% of 900
73.8
Find 36% of 385
138.6
Find 18.4% of 565
103.96
Find 7% of 220
15.4
Find 0.5% of 360
1.8
Find 12.5% of 88 11
Find 0.25% of 400 1
© T Madas

17. Calculating Percentage increases & decreases using multipliers
© T Madas

18. Percentage Changes using Multipliers
Calculate the following percentages by using multipliers:
Increase 220 by 15%:
Decrease 230 by 15%:
Increase 125 by 12%:
Decrease 180 by 9%:
Increase 320 by 22% :
Decrease 155 by 18%:
Increase 275 by 24%:
Decrease 725 by 25%:
Increase 520 by 35%:
Decrease 900 by 16%:
220
230
125
180
320
155
275
725
520
900
x 1.15 =
x 0.85 =
x 1.12 =
x 0.91 =
x 1.22 =
x 0.82 =
x 1.24 =
x 0.75 =
x 1.35 =
x 0.84 =
253
195.5
140
163.8
390.4
127.1
341
543.75
702
756
© T Madas

19. Percentage Changes using Multipliers
Calculate the following percentages by using multipliers:
Increase 260 by 15%:
Decrease 450 by 12%:
Increase 225 by 16%:
Decrease 184 by 5%:
Increase 780 by 7% :
Decrease 265 by 18%:
Increase 430 by 8%:
Decrease 870 by 6%:
Increase 520 by 17.5%:
Decrease 900 by 5.5%:
260
450
225
184
780
265
430
870
520
900
x 1.15 =
x 0.88 =
x 1.16 =
x 0.95 =
x 1.07 =
x 0.82 =
x 1.08 =
x 0.94 =
x =
x =
299
396
261
174.8
834.6
217.3
464.4
817.8
611
850.5
© T Madas

20. Percentage increase & decrease using Multipliers
Increase 320 by 10%
352
Increase 175 by 15%
201.25
Increase 156 by 35%
210.6
Decrease 240 by 20%
192
Decrease 865 by 40%
519
Increase 125 by 12%
140
Increase 264 by 29%
340.56
Decrease 1008 by 7%
937.44
Decrease 298 by 13%
259.26
© T Madas

21. Percentage increase & decrease using Multipliers
Increase 340 by 15%
391
Increase 245 by 18%
289.1
Increase 825 by 34%
1105.5
Decrease 280 by 15%
238
Decrease 345 by 40%
207
Increase 9832 by 16%
Increase 398 by 31%
521.38
Decrease 1538 by 5%
1461.1
Decrease 312 by 11%
277.68
© T Madas

22. Test on
Percentage
increases & decreases
using multipliers
© T Madas

23. Percentage Changes using Multipliers
Calculate the following percentages by using multipliers:
Increase 220 by 15%:
Decrease 230 by 15%:
Increase 125 by 12%:
Decrease 180 by 9%:
Increase 320 by 22% :
Decrease 155 by 18%:
Increase 275 by 24%:
Decrease 725 by 25%:
Increase 520 by 35%:
Decrease 900 by 16%:
220
230
125
180
320
155
275
725
520
900
x 1.15 =
x 0.85 =
x 1.12 =
x 0.91 =
x 1.22 =
x 0.82 =
x 1.24 =
x 0.75 =
x 1.35 =
x 0.84 =
253
195.5
140
163.8
390.4
127.1
341
543.75
702
756
© T Madas

24. Percentage Changes using Multipliers
Calculate the following percentages by using multipliers:
Increase 260 by 15%:
Decrease 450 by 12%:
Increase 225 by 16%:
Decrease 184 by 5%:
Increase 780 by 7% :
Decrease 265 by 18%:
Increase 430 by 8%:
Decrease 870 by 6%:
Increase 520 by 17.5%:
Decrease 900 by 5.5%:
260
450
225
184
780
265
430
870
520
900
x 1.15 =
x 0.88 =
x 1.16 =
x 0.95 =
x 1.07 =
x 0.82 =
x 1.08 =
x 0.94 =
x =
x =
299
396
261
174.8
834.6
217.3
464.4
817.8
611
850.5
© T Madas

25. Percentage increase & decrease using Multipliers
Increase 320 by 10%
352
Increase 175 by 15%
201.25
Increase 156 by 35%
210.6
Decrease 240 by 20%
192
Decrease 865 by 40%
519
Increase 125 by 12%
140
Increase 264 by 29%
340.56
Decrease 1008 by 7%
937.44
Decrease 298 by 13%
259.26
© T Madas

26. Percentage increase & decrease using Multipliers
Increase 340 by 15%
391
Increase 245 by 18%
289.1
Increase 825 by 34%
1105.5
Decrease 280 by 15%
238
Decrease 345 by 40%
207
Increase 9832 by 16%
Increase 398 by 31%
521.38
Decrease 1538 by 5%
1461.1
Decrease 312 by 11%
277.68
© T Madas

27. Practice before a Percentage Change on finding the amount using a
calculator
© T Madas

28. Amounts Before Percentage Changes
What number was increased by 10% to give 121?
110
What number was increased by 15% to give 184?
160
What number was increased by 12% to give 252?
225
What number was increased by 27% to give 406.4?
320
What number was decreased by 10% to give 468?
520
What number was decreased by 25% to give 273?
364
What number was decreased by 40% to give 252?
420
What number was decreased by 11% to give 534?
600
© T Madas

29. Amounts Before Percentage Changes
What number was increased by 12% to give 140?
125
What number was decreased by 12% to give 484?
550
What number was increased by 17.5% to give 282?
240
What number was decreased by 17.5% to give 660?
800
What number was increased by 5.5% to give 147.7?
140
What number was decreased by 5.5% to give 1701?
1800
What number was increased by 1% to give 343.4?
340
What number was decreased by 1% to give 742.5?
750
© T Madas

30. Amounts Before Percentage Changes
110% of a number is 121. What is the number?
110
115% of a number is 184. What is the number?
160
112% of a number is 252. What is the number?
225
127% of a number is What is the number?
320
90% of a number is 468. What is the number?
520
75% of a number is 273. What is the number?
364
60% of a number is 252. What is the number?
420
89% of a number is 534. What is the number?
600
© T Madas

31. Amounts Before Percentage Changes
112% of a number is 140. What is the number?
125
88% of a number is 484. What is the number?
550
117.5% of a number is 282. What is the number?
240
87.5% of a number is 700. What is the number?
800
105.5% of a number is What is the number?
140
94.5% of a number is What is the number?
1800
101% of a number is What is the number?
340
99% of a number is What is the number?
750
© T Madas

32. Test before a Percentage Change on finding the amount using a
calculator
© T Madas

33. Amounts Before Percentage Changes
What number was increased by 10% to give 121?
110
What number was increased by 15% to give 184?
160
What number was increased by 12% to give 252?
225
What number was increased by 27% to give 406.4?
320
What number was decreased by 10% to give 468?
520
What number was decreased by 25% to give 273?
364
What number was decreased by 40% to give 252?
420
What number was decreased by 11% to give 534?
600
© T Madas

34. Amounts Before Percentage Changes
What number was increased by 12% to give 140?
125
What number was decreased by 12% to give 484?
550
What number was increased by 17.5% to give 282?
240
What number was decreased by 17.5% to give 660?
800
What number was increased by 5.5% to give 147.7?
140
What number was decreased by 5.5% to give 1701?
1800
What number was increased by 1% to give 343.4?
340
What number was decreased by 1% to give 742.5?
750
© T Madas

35. Amounts Before Percentage Changes
110% of a number is 121. What is the number?
110
115% of a number is 184. What is the number?
160
112% of a number is 252. What is the number?
225
127% of a number is What is the number?
320
90% of a number is 468. What is the number?
520
75% of a number is 273. What is the number?
364
60% of a number is 252. What is the number?
420
89% of a number is 534. What is the number?
600
© T Madas

36. Amounts Before Percentage Changes
112% of a number is 140. What is the number?
125
88% of a number is 484. What is the number?
550
117.5% of a number is 282. What is the number?
240
87.5% of a number is 700. What is the number?
800
105.5% of a number is What is the number?
140
94.5% of a number is What is the number?
1800
101% of a number is What is the number?
340
99% of a number is What is the number?
750
© T Madas

37. © T Madas