17.5% is the change from 120 to 141
Calculation steps:
[( 141 - 120 ) ÷ 120] x 100 = 17.5%
Formula
Percentage change = [(141 - 120) / 120] x 100
Subtract the new number by the original number
141 - 120 = 21
21 ÷ 120 = 0.175
0.175 x 100 = 17.5%
Example