-83.65% is the change from 526 to 86
Calculation steps:
[( 86 - 526 ) ÷ 526] x 100 = -83.65%
Formula
Percentage change = [(86 - 526) / 526] x 100
Subtract the new number by the original number
86 - 526 = -440
-440 ÷ 526 = -0.8365019011406845
-0.8365019011406845 x 100 = -83.65%