-50.25% is the change from 987 to 491
Calculation steps:
[( 491 - 987 ) ÷ 987] x 100 = -50.25%
Formula
Percentage change = [(491 - 987) / 987] x 100
Subtract the new number by the original number
491 - 987 = -496
-496 ÷ 987 = -0.502532928064843
-0.502532928064843 x 100 = -50.25%