-81.98% is the change from 810 to 146
Calculation steps:
[( 146 - 810 ) ÷ 810] x 100 = -81.98%
Formula
Percentage change = [(146 - 810) / 810] x 100
Subtract the new number by the original number
146 - 810 = -664
-664 ÷ 810 = -0.8197530864197531
-0.8197530864197531 x 100 = -81.98%