-18.06% is the change from 836 to 685
Calculation steps:
[( 685 - 836 ) ÷ 836] x 100 = -18.06%
Formula
Percentage change = [(685 - 836) / 836] x 100
Subtract the new number by the original number
685 - 836 = -151
-151 ÷ 836 = -0.180622009569378
-0.180622009569378 x 100 = -18.06%