-22.3% is the change from 816 to 634
Calculation steps:
[( 634 - 816 ) ÷ 816] x 100 = -22.3%
Formula
Percentage change = [(634 - 816) / 816] x 100
Subtract the new number by the original number
634 - 816 = -182
-182 ÷ 816 = -0.22303921568627452
-0.22303921568627452 x 100 = -22.3%