-78.67% is the change from 811 to 173
Calculation steps:
[( 173 - 811 ) ÷ 811] x 100 = -78.67%
Formula
Percentage change = [(173 - 811) / 811] x 100
Subtract the new number by the original number
173 - 811 = -638
-638 ÷ 811 = -0.7866831072749692
-0.7866831072749692 x 100 = -78.67%