20% is the change from 120 to 144
Calculation steps:
[( 144 - 120 ) ÷ 120] x 100 = 20%
Formula
Percentage change = [(144 - 120) / 120] x 100
Subtract the new number by the original number
144 - 120 = 24
24 ÷ 120 = 0.2
0.2 x 100 = 20%
Example