20.12% is the change from 502 to 603
Calculation steps:
[( 603 - 502 ) ÷ 502] x 100 = 20.12%
Formula
Percentage change = [(603 - 502) / 502] x 100
Subtract the new number by the original number
603 - 502 = 101
101 ÷ 502 = 0.20119521912350596
0.20119521912350596 x 100 = 20.12%