-19.6% is the change from 842 to 677
Calculation steps:
[( 677 - 842 ) ÷ 842] x 100 = -19.6%
Formula
Percentage change = [(677 - 842) / 842] x 100
Subtract the new number by the original number
677 - 842 = -165
-165 ÷ 842 = -0.19596199524940616
-0.19596199524940616 x 100 = -19.6%