-18.41% is the change from 842 to 687
Calculation steps:
[( 687 - 842 ) ÷ 842] x 100 = -18.41%
Formula
Percentage change = [(687 - 842) / 842] x 100
Subtract the new number by the original number
687 - 842 = -155
-155 ÷ 842 = -0.1840855106888361
-0.1840855106888361 x 100 = -18.41%