-81.87% is the change from 811 to 147
Calculation steps:
[( 147 - 811 ) ÷ 811] x 100 = -81.87%
Formula
Percentage change = [(147 - 811) / 811] x 100
Subtract the new number by the original number
147 - 811 = -664
-664 ÷ 811 = -0.8187422934648582
-0.8187422934648582 x 100 = -81.87%