-85.86% is the change from 502 to 71
Calculation steps:
[( 71 - 502 ) ÷ 502] x 100 = -85.86%
Formula
Percentage change = [(71 - 502) / 502] x 100
Subtract the new number by the original number
71 - 502 = -431
-431 ÷ 502 = -0.8585657370517928
-0.8585657370517928 x 100 = -85.86%