-90.6% is the change from 862 to 81
Calculation steps:
[( 81 - 862 ) ÷ 862] x 100 = -90.6%
Formula
Percentage change = [(81 - 862) / 862] x 100
Subtract the new number by the original number
81 - 862 = -781
-781 ÷ 862 = -0.9060324825986079
-0.9060324825986079 x 100 = -90.6%