-50% is the change from 984 to 492
Calculation steps:
[( 492 - 984 ) ÷ 984] x 100 = -50%
Formula
Percentage change = [(492 - 984) / 984] x 100
Subtract the new number by the original number
492 - 984 = -492
-492 ÷ 984 = -0.5
-0.5 x 100 = -50%
Example