-98.64% is the change from 811 to 11
Calculation steps:
[( 11 - 811 ) ÷ 811] x 100 = -98.64%
Formula
Percentage change = [(11 - 811) / 811] x 100
Subtract the new number by the original number
11 - 811 = -800
-800 ÷ 811 = -0.9864364981504316
-0.9864364981504316 x 100 = -98.64%