-90.26% is the change from 832 to 81
Calculation steps:
[( 81 - 832 ) ÷ 832] x 100 = -90.26%
Formula
Percentage change = [(81 - 832) / 832] x 100
Subtract the new number by the original number
81 - 832 = -751
-751 ÷ 832 = -0.9026442307692307
-0.9026442307692307 x 100 = -90.26%