100% is the change from 72 to 144
Calculation steps:
[( 144 - 72 ) ÷ 72] x 100 = 100%
Formula
Percentage change = [(144 - 72) / 72] x 100
Subtract the new number by the original number
144 - 72 = 72
72 ÷ 72 = 1
1 x 100 = 100%
Example