-82.58% is the change from 488 to 85
Calculation steps:
[( 85 - 488 ) ÷ 488] x 100 = -82.58%
Formula
Percentage change = [(85 - 488) / 488] x 100
Subtract the new number by the original number
85 - 488 = -403
-403 ÷ 488 = -0.8258196721311475
-0.8258196721311475 x 100 = -82.58%