4.18% is the change from 502 to 523
Calculation steps:
[( 523 - 502 ) ÷ 502] x 100 = 4.18%
Formula
Percentage change = [(523 - 502) / 502] x 100
Subtract the new number by the original number
523 - 502 = 21
21 ÷ 502 = 0.04183266932270916
0.04183266932270916 x 100 = 4.18%