By what percent will a fraction increase if its numerator is increased by 60% and its denominator is decreased by 20%?

The first thing you do is assume a fraction, let's say:

1/2

if the numerator is increased by 60% and its denominator is decreased by 20%, then:

(1 (1+60%)) / (2*.8) = 1.6/1.6=1

So, 1/2 became 1. Let's find out the percentage the fraction increased:

1 - (1/2) = 1/2=.5

then

(1/2) / 1=1/2=.5=50%

Therefore, a fraction will increase by 50%