-17.82% is the change from 836 to 687
Calculation steps:
[( 687 - 836 ) ÷ 836] x 100 = -17.82%
Formula
Percentage change = [(687 - 836) / 836] x 100
Subtract the new number by the original number
687 - 836 = -149
-149 ÷ 836 = -0.17822966507177032
-0.17822966507177032 x 100 = -17.82%