0.4% is the change from 501 to 503
Calculation steps:
[( 503 - 501 ) ÷ 501] x 100 = 0.4%
Formula
Percentage change = [(503 - 501) / 501] x 100
Subtract the new number by the original number
503 - 501 = 2
2 ÷ 501 = 0.003992015968063872
0.003992015968063872 x 100 = 0.4%