-23.04% is the change from 816 to 628
Calculation steps:
[( 628 - 816 ) ÷ 816] x 100 = -23.04%
Formula
Percentage change = [(628 - 816) / 816] x 100
Subtract the new number by the original number
628 - 816 = -188
-188 ÷ 816 = -0.23039215686274508
-0.23039215686274508 x 100 = -23.04%