-81.7% is the change from 470 to 86
Calculation steps:
[( 86 - 470 ) ÷ 470] x 100 = -81.7%
Formula
Percentage change = [(86 - 470) / 470] x 100
Subtract the new number by the original number
86 - 470 = -384
-384 ÷ 470 = -0.8170212765957446
-0.8170212765957446 x 100 = -81.7%