-21.29% is the change from 808 to 636
Calculation steps:
[( 636 - 808 ) ÷ 808] x 100 = -21.29%
Formula
Percentage change = [(636 - 808) / 808] x 100
Subtract the new number by the original number
636 - 808 = -172
-172 ÷ 808 = -0.21287128712871287
-0.21287128712871287 x 100 = -21.29%