Percentages Equivalent Fraction

33.33% 1/3

16.66% or 16.67% 1/6

66.66% or 66.67% 2/3

6.66% or 6.67% 2/30 or 1/15

14.28% 1/7

12.5% 1/8

11.11% 1/9

9.09% 1/11

8.33% 1/12

7.14% 1/14

Let us say you have a question that states that a family spends 66.66% of its income and saves the rest. If its savings is USD 3000, how much did the family spend?

66.66% can be written as 2/3rd. So, the family spends 2/3rds of its income.

The balance that the family saves = 1 - 2/3 = 1/3rd of the income.

Savings = USD 3000 = 1/3rd the income

Hence, income = 3*3000 = USD 9000.

Trying to crack the same question keeping it in percent terms could lead to unsavory calculations.

Labels: Calculation, Fractions, GMAT Math, Percent, Shortcuts, Tips