-81.75% is the change from 811 to 148
Calculation steps:
[( 148 - 811 ) ÷ 811] x 100 = -81.75%
Formula
Percentage change = [(148 - 811) / 811] x 100
Subtract the new number by the original number
148 - 811 = -663
-663 ÷ 811 = -0.8175092478421702
-0.8175092478421702 x 100 = -81.75%