-98.77% is the change from 811 to 10
Calculation steps:
[( 10 - 811 ) ÷ 811] x 100 = -98.77%
Formula
Percentage change = [(10 - 811) / 811] x 100
Subtract the new number by the original number
10 - 811 = -801
-801 ÷ 811 = -0.9876695437731196
-0.9876695437731196 x 100 = -98.77%