-79.53% is the change from 811 to 166
Calculation steps:
[( 166 - 811 ) ÷ 811] x 100 = -79.53%
Formula
Percentage change = [(166 - 811) / 811] x 100
Subtract the new number by the original number
166 - 811 = -645
-645 ÷ 811 = -0.7953144266337855
-0.7953144266337855 x 100 = -79.53%