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Decimal to Percent
Percent to Decimal
Fraction to Percent
% of a number
Find the whole given the part
100

0.40

40%

100

30%

0.30

100

74/100

74%

100

25% of 80

20

100

80% of a number is 12. What is the number?

15

200

0.25

25%

200

82%

0.82

200

9/10

90%

200

30% of 70

21

200

75% of a number is 15. What is the number?

20

300

0.03

3%

300

6%

0.06

300

12/20

60%

300

10% of 40      

4
300

25% of a number is 16. What is the number?

64

400

1.00

100%

400

130%

1.30

400

18/25

72%

400

40% of 60

24

400

30% of a number is 36. What is the number?

120

500

1.20

120%

500

260%

2.60

500

30/20

150%

500

25% of 50      

12.5

500

70% of a number is 63. What is the number?

90