Decimals to Fractions
Solving Proportions
Ratio to Percent
Percent to Ratio
Finding the Part
Finding the Percent
100

0.9

9/10

100

4/9 = 8/n

n = 18

100

39/100

39%

100

19%

19/100

100

40% * 75 = n

n = 30

100

p x 30 = 18

p = 60%
200

5.25

21/4

200

n/7 = 12/21

n = 4

200

1/4

25%

200

40%

2/5

200

8% * 200 = n

n = 16

200

p x 150 = 6

4%

300

0.625

5/8

300

12/n = 30/80

n = 32

300

19/25

76%

300

72%

18/25

300

75% of 160

120

300

p x 12 = 36

300%

400

23.75

95/4

400

n/20 = 210/700

n = 6

400

1 1/2

150%

400

130%

1 3/10

400

140% of 95

133

400

75 is what percent of 375? 

20%

500

0.312

39/125

500

n/17 = 63/119

n = 9

500

5/8

62.5%

500

17 1/2%

7/40

500

3.5% * 3000 = n

n = 105

500

What percent of 640 is 720? 

112.5%

M
e
n
u