-21.38% is the change from 842 to 662
Calculation steps:
[( 662 - 842 ) ÷ 842] x 100 = -21.38%
Formula
Percentage change = [(662 - 842) / 842] x 100
Subtract the new number by the original number
662 - 842 = -180
-180 ÷ 842 = -0.21377672209026127
-0.21377672209026127 x 100 = -21.38%