-1% is the change from 502 to 497
Calculation steps:
[( 497 - 502 ) ÷ 502] x 100 = -1%
Formula
Percentage change = [(497 - 502) / 502] x 100
Subtract the new number by the original number
497 - 502 = -5
-5 ÷ 502 = -0.0099601593625498
-0.0099601593625498 x 100 = -1%