402.5% is the change from 120 to 603
Calculation steps:
[( 603 - 120 ) ÷ 120] x 100 = 402.5%
Formula
Percentage change = [(603 - 120) / 120] x 100
Subtract the new number by the original number
603 - 120 = 483
483 ÷ 120 = 4.025
4.025 x 100 = 402.5%
Example