-86.16% is the change from 643 to 89
Calculation steps:
[( 89 - 643 ) ÷ 643] x 100 = -86.16%
Formula
Percentage change = [(89 - 643) / 643] x 100
Subtract the new number by the original number
89 - 643 = -554
-554 ÷ 643 = -0.8615863141524106
-0.8615863141524106 x 100 = -86.16%