125% is the change from 120 to 270
Calculation steps:
[( 270 - 120 ) ÷ 120] x 100 = 125%
Formula
Percentage change = [(270 - 120) / 120] x 100
Subtract the new number by the original number
270 - 120 = 150
150 ÷ 120 = 1.25
1.25 x 100 = 125%
Example