310% is the change from 120 to 492
Calculation steps:
[( 492 - 120 ) ÷ 120] x 100 = 310%
Formula
Percentage change = [(492 - 120) / 120] x 100
Subtract the new number by the original number
492 - 120 = 372
372 ÷ 120 = 3.1
3.1 x 100 = 310%
Example