-81.95% is the change from 809 to 146
Calculation steps:
[( 146 - 809 ) ÷ 809] x 100 = -81.95%
Formula
Percentage change = [(146 - 809) / 809] x 100
Subtract the new number by the original number
146 - 809 = -663
-663 ÷ 809 = -0.8195302843016069
-0.8195302843016069 x 100 = -81.95%