-82.83% is the change from 501 to 86
Calculation steps:
[( 86 - 501 ) ÷ 501] x 100 = -82.83%
Formula
Percentage change = [(86 - 501) / 501] x 100
Subtract the new number by the original number
86 - 501 = -415
-415 ÷ 501 = -0.8283433133732535
-0.8283433133732535 x 100 = -82.83%