-81.63% is the change from 811 to 149
Calculation steps:
[( 149 - 811 ) ÷ 811] x 100 = -81.63%
Formula
Percentage change = [(149 - 811) / 811] x 100
Subtract the new number by the original number
149 - 811 = -662
-662 ÷ 811 = -0.8162762022194822
-0.8162762022194822 x 100 = -81.63%