0.2% is the change from 500 to 501
Calculation steps:
[( 501 - 500 ) ÷ 500] x 100 = 0.2%
Formula
Percentage change = [(501 - 500) / 500] x 100
Subtract the new number by the original number
501 - 500 = 1
1 ÷ 500 = 0.002
0.002 x 100 = 0.2%
Example