-81.9% is the change from 812 to 147
Calculation steps:
[( 147 - 812 ) ÷ 812] x 100 = -81.9%
Formula
Percentage change = [(147 - 812) / 812] x 100
Subtract the new number by the original number
147 - 812 = -665
-665 ÷ 812 = -0.8189655172413793
-0.8189655172413793 x 100 = -81.9%