-98.15% is the change from 487 to 9
Calculation steps:
[( 9 - 487 ) ÷ 487] x 100 = -98.15%
Formula
Percentage change = [(9 - 487) / 487] x 100
Subtract the new number by the original number
9 - 487 = -478
-478 ÷ 487 = -0.9815195071868583
-0.9815195071868583 x 100 = -98.15%