-82.55% is the change from 487 to 85
Calculation steps:
[( 85 - 487 ) ÷ 487] x 100 = -82.55%
Formula
Percentage change = [(85 - 487) / 487] x 100
Subtract the new number by the original number
85 - 487 = -402
-402 ÷ 487 = -0.8254620123203286
-0.8254620123203286 x 100 = -82.55%