-50% is the change from 982 to 491
Calculation steps:
[( 491 - 982 ) ÷ 982] x 100 = -50%
Formula
Percentage change = [(491 - 982) / 982] x 100
Subtract the new number by the original number
491 - 982 = -491
-491 ÷ 982 = -0.5
-0.5 x 100 = -50%
Example