-86.62% is the change from 665 to 89
Calculation steps:
[( 89 - 665 ) ÷ 665] x 100 = -86.62%
Formula
Percentage change = [(89 - 665) / 665] x 100
Subtract the new number by the original number
89 - 665 = -576
-576 ÷ 665 = -0.8661654135338346
-0.8661654135338346 x 100 = -86.62%