-22.79% is the change from 816 to 630
Calculation steps:
[( 630 - 816 ) ÷ 816] x 100 = -22.79%
Formula
Percentage change = [(630 - 816) / 816] x 100
Subtract the new number by the original number
630 - 816 = -186
-186 ÷ 816 = -0.22794117647058823
-0.22794117647058823 x 100 = -22.79%