50% is the change from 72 to 108
Calculation steps:
[( 108 - 72 ) ÷ 72] x 100 = 50%
Formula
Percentage change = [(108 - 72) / 72] x 100
Subtract the new number by the original number
108 - 72 = 36
36 ÷ 72 = 0.5
0.5 x 100 = 50%
Example