-86.22% is the change from 646 to 89
Calculation steps:
[( 89 - 646 ) ÷ 646] x 100 = -86.22%
Formula
Percentage change = [(89 - 646) / 646] x 100
Subtract the new number by the original number
89 - 646 = -557
-557 ÷ 646 = -0.8622291021671826
-0.8622291021671826 x 100 = -86.22%