162.5% is the change from 120 to 315
Calculation steps:
[( 315 - 120 ) ÷ 120] x 100 = 162.5%
Formula
Percentage change = [(315 - 120) / 120] x 100
Subtract the new number by the original number
315 - 120 = 195
195 ÷ 120 = 1.625
1.625 x 100 = 162.5%
Example