-34.76% is the change from 984 to 642
Calculation steps:
[( 642 - 984 ) ÷ 984] x 100 = -34.76%
Formula
Percentage change = [(642 - 984) / 984] x 100
Subtract the new number by the original number
642 - 984 = -342
-342 ÷ 984 = -0.3475609756097561
-0.3475609756097561 x 100 = -34.76%