-16.79% is the change from 816 to 679
Calculation steps:
[( 679 - 816 ) ÷ 816] x 100 = -16.79%
Formula
Percentage change = [(679 - 816) / 816] x 100
Subtract the new number by the original number
679 - 816 = -137
-137 ÷ 816 = -0.16789215686274508
-0.16789215686274508 x 100 = -16.79%