-21.82% is the change from 811 to 634
Calculation steps:
[( 634 - 811 ) ÷ 811] x 100 = -21.82%
Formula
Percentage change = [(634 - 811) / 811] x 100
Subtract the new number by the original number
634 - 811 = -177
-177 ÷ 811 = -0.218249075215783
-0.218249075215783 x 100 = -21.82%