-18.29% is the change from 842 to 688
Calculation steps:
[( 688 - 842 ) ÷ 842] x 100 = -18.29%
Formula
Percentage change = [(688 - 842) / 842] x 100
Subtract the new number by the original number
688 - 842 = -154
-154 ÷ 842 = -0.1828978622327791
-0.1828978622327791 x 100 = -18.29%