-23.28% is the change from 842 to 646
Calculation steps:
[( 646 - 842 ) ÷ 842] x 100 = -23.28%
Formula
Percentage change = [(646 - 842) / 842] x 100
Subtract the new number by the original number
646 - 842 = -196
-196 ÷ 842 = -0.2327790973871734
-0.2327790973871734 x 100 = -23.28%