1. Percent Models 2 and 3

2. What percent of 120 is 48?
Put GFC of 120 and 48 in boxes

3. Greatest Common Factor
How to find GFC
Greatest Common Factor
120 and 48
48?
120 divided by 48 = 2.5
120 divided by 24 = 5
24?
YES!

4. What percent of 120 is 48?
40%
Make a bar model with GFC in boxes 24
24 x 2 = 48

5. What percent of 95 is 19?
Put GFC of 19 and 95 in boxes

6. Greatest Common Factor
How to find GFC
Greatest Common Factor
95 and 19
95 divided by 19 = 5
YES!

7. What percent of 95 is 19?
Make a bar model with GFC in boxes 19 1 5
= 20%
19 x 1 = 19

8. What percent of 80 is 60?
Put GFC of 80 and 60 in boxes

9. Greatest Common Factor
How to find GFC
Greatest Common Factor
80 and 60
60?
80 divided by 60 = 1.3
20?
80 divided by 20 = 4
YES!

10. What percent of 80 is 60?
Make a bar model with GFC in boxes 20 3 4
= 75%
20 x 3 = 60

11. The known part goes in boxes
12 is 10% of what number?
The known part goes in boxes

12. 12 is 10% of what number?
Make a bar model with the known part in boxes 12
12 x 10 = 120

13. The known part goes in boxes
45 is 15% of what number?
The known part goes in boxes

14. 45 is 15% of what number?
Make a bar model with the known part in boxes 45 45 45 45 45 45 45
15%
30%
45%
60%
75%
105%
90%

15. How to allow for extra 5% 15 45 15 5% 5%

16. 45 is 15% of what number? 45 45 45 45 45 45 45 5% 5%
90%
= 100%

17. 45 is 15% of what number? 45 45 45 45 45 45 45
6 x x 15 =
300

18. The known part goes in boxes
30 is 25% of what number?
The known part goes in boxes

19. 30 is 25% of what number?
Make a bar model with the known part in boxes 30
4 x 30 = 120