-16.61% is the change from 602 to 502
Calculation steps:
[( 502 - 602 ) ÷ 602] x 100 = -16.61%
Formula
Percentage change = [(502 - 602) / 602] x 100
Subtract the new number by the original number
502 - 602 = -100
-100 ÷ 602 = -0.16611295681063123
-0.16611295681063123 x 100 = -16.61%