-89.29% is the change from 831 to 89
Calculation steps:
[( 89 - 831 ) ÷ 831] x 100 = -89.29%
Formula
Percentage change = [(89 - 831) / 831] x 100
Subtract the new number by the original number
89 - 831 = -742
-742 ÷ 831 = -0.8929001203369434
-0.8929001203369434 x 100 = -89.29%