-81.77% is the change from 812 to 148
Calculation steps:
[( 148 - 812 ) ÷ 812] x 100 = -81.77%
Formula
Percentage change = [(148 - 812) / 812] x 100
Subtract the new number by the original number
148 - 812 = -664
-664 ÷ 812 = -0.8177339901477833
-0.8177339901477833 x 100 = -81.77%