-21.7% is the change from 811 to 635
Calculation steps:
[( 635 - 811 ) ÷ 811] x 100 = -21.7%
Formula
Percentage change = [(635 - 811) / 811] x 100
Subtract the new number by the original number
635 - 811 = -176
-176 ÷ 811 = -0.21701602959309493
-0.21701602959309493 x 100 = -21.7%