-21.31% is the change from 807 to 635
Calculation steps:
[( 635 - 807 ) ÷ 807] x 100 = -21.31%
Formula
Percentage change = [(635 - 807) / 807] x 100
Subtract the new number by the original number
635 - 807 = -172
-172 ÷ 807 = -0.21313506815365552
-0.21313506815365552 x 100 = -21.31%