-17.03% is the change from 816 to 677
Calculation steps:
[( 677 - 816 ) ÷ 816] x 100 = -17.03%
Formula
Percentage change = [(677 - 816) / 816] x 100
Subtract the new number by the original number
677 - 816 = -139
-139 ÷ 816 = -0.17034313725490197
-0.17034313725490197 x 100 = -17.03%