Answers

2015-10-15T23:52:07+05:30
Let the number be 100.
if it is decreased by 20%, new number will be
100 + 20% of 100 = 100 + 20 = 120

how much % should 120 be decreased to get 100
we need to decrease = 120-100 = 20

% = 20/120 * 100 = 16.67%
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