-82.67% is the change from 502 to 87
Calculation steps:
[( 87 - 502 ) ÷ 502] x 100 = -82.67%
Formula
Percentage change = [(87 - 502) / 502] x 100
Subtract the new number by the original number
87 - 502 = -415
-415 ÷ 502 = -0.8266932270916335
-0.8266932270916335 x 100 = -82.67%