-83.59% is the change from 524 to 86
Calculation steps:
[( 86 - 524 ) ÷ 524] x 100 = -83.59%
Formula
Percentage change = [(86 - 524) / 524] x 100
Subtract the new number by the original number
86 - 524 = -438
-438 ÷ 524 = -0.8358778625954199
-0.8358778625954199 x 100 = -83.59%