Important Points Percentages -1

Percentages

 

 

a % of b = b % of a

Eg: 50 % of 68 = 68 % of 50 = 34

Double and Half Technique

Generalized:

a x b = 2a x b/2 (a and b are random numbers)

Eg: 35% of 44.2 = 70% of 22.11

 

Percentages to Fractions

MUST REMEMBER

 100% = 1

50% = 1/2

33 1/3 = 1/3

25% = 1/4

20% = 1/5

16 2/3% =  1/6

14 2/7% = 1/7

12 1/2% =  1/8

11 1/9% =  1/9

10% = 1/10

9 1/11% = 9 1/11

8 1/3% = 1/12

7 9/13% = 1/13

7 1/7% = 1/14

6 2/3% = 1/15