1. Reverse Percentage – Calculator – Answer Grid
Students can check their answers:
if it is not in the Answer Grid they need to try again!
Questions increase in difficulty from Red to Amber to Green.
The worksheet is in two sizes.

2. Printing To print handouts from slides -
Select the slide from the left. Then click:
File > Print > ‘Print Current Slide’
To print multiple slides -
Click on a section title to highlight all those slides,
or press ‘Ctrl’ at the same time as selecting slides to
highlight more than one. Then click:
File > Print > ‘Print Selection’
To print double-sided handouts -
Highlight both slides before using ‘Print Selection’.
Choose ‘Print on Both Sides’ and ‘Flip on Short Edge’.

3. Find each answer in the GRID!

4. Find the old price & cross it off.
Total the remaining 5.
33.17
675
570
156.25
266.67
500
24.44
62.54
207.46
459.02
297.85
463.16
200
885.71
103.26
120
450
105.35
535.29
600
300
124.71
220
767.19
410
RED
Tax: 20%
New Price: $600
Discount: 30%
New Price: $620
Tax: 30%
New Price: $390
Discount: 10%
New Price: $540
Tax: 50%
New Price: $330
Discount: 20%
Tax: 40%
New Price: $280
Discount: 60%
New Price: $180
Tax: 60%
New Price: $250
Discount: 70%
New Price: $80
AMBER
Discount: 15%
New Price: $455
Tax: 34%
New Price: $278
Discount: 62%
New Price: $176
Tax: 28%
New Price: $982
Discount: 7%
New Price: $277
GREEN
Tax: 12.5%
New Price: $27.50
Discount: 6.5%
New Price: $98.50
Tax: 3.25%
New Price: $34.25
Discount: 34.74%
New Price: $67.39
Tax: 16.78%
New Price: $145.64
Total:

5. Find the old price & cross it off.
Answers
Find the old price & cross it off.
Total the remaining 5.
33.17
675
570
156.25
266.67
500
24.44
62.54
207.46
459.02
297.85
463.16
200
885.71
103.26
120
450
105.35
535.29
600
300
124.71
220
767.19
410
RED
Tax: 20%
New Price: $600
Discount: 30%
New Price: $620
Tax: 30%
New Price: $390
Discount: 10%
New Price: $540
Tax: 50%
New Price: $330
Discount: 20%
Tax: 40%
New Price: $280
Discount: 60%
New Price: $180
Tax: 60%
New Price: $250
Discount: 70%
New Price: $80
AMBER
Discount: 15%
New Price: $455
Tax: 34%
New Price: $278
Discount: 62%
New Price: $176
Tax: 28%
New Price: $982
Discount: 7%
New Price: $277
GREEN
Tax: 12.5%
New Price: $27.50
Discount: 6.5%
New Price: $98.50
Tax: 3.25%
New Price: $34.25
Discount: 34.74%
New Price: $67.39
Tax: 16.78%
New Price: $145.64
Total:

6. Total: Total: Find the old price & cross it off.
Total the remaining 5.
33.17
675
570
156.25
266.67
500
24.44
62.54
207.46
459.02
297.85
463.16
200
885.71
103.26
120
450
105.35
535.29
600
300
124.71
220
767.19
410
RED
Tax: 20%
New Price: $600
Discount: 30%
New Price: $620
Tax: 30%
New Price: $390
Discount: 10%
New Price: $540
Tax: 50%
New Price: $330
Discount: 20%
Tax: 40%
New Price: $280
Discount: 60%
New Price: $180
Tax: 60%
New Price: $250
Discount: 70%
New Price: $80
AMBER
Discount: 15%
New Price: $455
Tax: 34%
New Price: $278
Discount: 62%
New Price: $176
Tax: 28%
New Price: $982
Discount: 7%
New Price: $277
GREEN
Tax: 12.5%
New Price: $27.50
Discount: 6.5%
New Price: $98.50
Tax: 3.25%
New Price: $34.25
Discount: 34.74%
New Price: $67.39
Tax: 16.78%
New Price: $145.64
Total:
Find the old price & cross it off.
Total the remaining 5.
33.17
675
570
156.25
266.67
500
24.44
62.54
207.46
459.02
297.85
463.16
200
885.71
103.26
120
450
105.35
535.29
600
300
124.71
220
767.19
410
RED
Tax: 20%
New Price: $600
Discount: 30%
New Price: $620
Tax: 30%
New Price: $390
Discount: 10%
New Price: $540
Tax: 50%
New Price: $330
Discount: 20%
Tax: 40%
New Price: $280
Discount: 60%
New Price: $180
Tax: 60%
New Price: $250
Discount: 70%
New Price: $80
AMBER
Discount: 15%
New Price: $455
Tax: 34%
New Price: $278
Discount: 62%
New Price: $176
Tax: 28%
New Price: $982
Discount: 7%
New Price: $277
GREEN
Tax: 12.5%
New Price: $27.50
Discount: 6.5%
New Price: $98.50
Tax: 3.25%
New Price: $34.25
Discount: 34.74%
New Price: $67.39
Tax: 16.78%
New Price: $145.64
Total:

8. tom@goteachmaths.co.uk Questions? Comments? Suggestions?
…or have you found a mistake!?
Any feedback would be appreciated .
Please feel free to