-19.02% is the change from 836 to 677
Calculation steps:
[( 677 - 836 ) ÷ 836] x 100 = -19.02%
Formula
Percentage change = [(677 - 836) / 836] x 100
Subtract the new number by the original number
677 - 836 = -159
-159 ÷ 836 = -0.1901913875598086
-0.1901913875598086 x 100 = -19.02%