-85.12% is the change from 578 to 86
Calculation steps:
[( 86 - 578 ) ÷ 578] x 100 = -85.12%
Formula
Percentage change = [(86 - 578) / 578] x 100
Subtract the new number by the original number
86 - 578 = -492
-492 ÷ 578 = -0.8512110726643599
-0.8512110726643599 x 100 = -85.12%