-21.8% is the change from 812 to 635
Calculation steps:
[( 635 - 812 ) ÷ 812] x 100 = -21.8%
Formula
Percentage change = [(635 - 812) / 812] x 100
Subtract the new number by the original number
635 - 812 = -177
-177 ÷ 812 = -0.21798029556650247
-0.21798029556650247 x 100 = -21.8%