-16.73% is the change from 502 to 418
Calculation steps:
[( 418 - 502 ) ÷ 502] x 100 = -16.73%
Formula
Percentage change = [(418 - 502) / 502] x 100
Subtract the new number by the original number
418 - 502 = -84
-84 ÷ 502 = -0.16733067729083664
-0.16733067729083664 x 100 = -16.73%