Important points about Decimals (Shortcuts)

 1% = 1/100 = 0.01  (if two zeros are given, just move the decimal pointer two places left)

2% = 2/100 = 0.02 = 1/50 

3% = 3/100 = 0.03

4% = 4/100 = 0.04 = 1/25

5% = 5/100 = 0.05 = 1/20

6.25% = 6.25/100 = 0.0625 = 1/16

7% = 7/100 = 0.07

7.5% = 7.5/100 = 0.075

10% = 10/100 = 0.1 = 1/10

12.5% = 12.5/100 = 0.125 = 1/8

20% = 0.2 = 1/5

21% = 0.21

25% = 0.25 = 1/4

30% = 0.3 = 3/10

33.33% = 33.33/100 = 0.3333 = 1/3

37.5% = 0.375 = 3/8

40% = 0.4 = 2/5

50% = 0.5 = 1/2

60% = 0.6 = 3/5

62.5% = 0.625 = 5/8

66.66% = 66.66/100 = 2/3

75% = 0.75 = 3/4

80% = 0.8 = 4/5

87.5% = 0.875 = 7/8

100% = 1

125% = 1.25 = 1 1/4

150% = 1.5 = 1 1/2

200% = 2