Question

A number first increases by 30% and then decreases by 20%.Find the percent increase or decrease on the whole.
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Answer 1

For 30% increase:

$\frac{130}{100}x$

For 20% decrease:

$\frac{130}{100}x*\frac{80}{100}=\frac{104}{100}x$

Thus, the whole increase will be 4%.