20.6% is the change from 500 to 603
Calculation steps:
[( 603 - 500 ) ÷ 500] x 100 = 20.6%
Formula
Percentage change = [(603 - 500) / 500] x 100
Subtract the new number by the original number
603 - 500 = 103
103 ÷ 500 = 0.206
0.206 x 100 = 20.6%
Example