-87.01% is the change from 662 to 86
Calculation steps:
[( 86 - 662 ) ÷ 662] x 100 = -87.01%
Formula
Percentage change = [(86 - 662) / 662] x 100
Subtract the new number by the original number
86 - 662 = -576
-576 ÷ 662 = -0.8700906344410876
-0.8700906344410876 x 100 = -87.01%