0.2% is the change from 502 to 503
Calculation steps:
[( 503 - 502 ) ÷ 502] x 100 = 0.2%
Formula
Percentage change = [(503 - 502) / 502] x 100
Subtract the new number by the original number
503 - 502 = 1
1 ÷ 502 = 0.00199203187250996
0.00199203187250996 x 100 = 0.2%