158.33% is the change from 120 to 310
Calculation steps:
[( 310 - 120 ) ÷ 120] x 100 = 158.33%
Formula
Percentage change = [(310 - 120) / 120] x 100
Subtract the new number by the original number
310 - 120 = 190
190 ÷ 120 = 1.5833333333333333
1.5833333333333333 x 100 = 158.33%