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