-81.55% is the change from 813 to 150
Calculation steps:
[( 150 - 813 ) ÷ 813] x 100 = -81.55%
Formula
Percentage change = [(150 - 813) / 813] x 100
Subtract the new number by the original number
150 - 813 = -663
-663 ÷ 813 = -0.8154981549815498
-0.8154981549815498 x 100 = -81.55%