-98.17% is the change from 493 to 9
Calculation steps:
[( 9 - 493 ) ÷ 493] x 100 = -98.17%
Formula
Percentage change = [(9 - 493) / 493] x 100
Subtract the new number by the original number
9 - 493 = -484
-484 ÷ 493 = -0.9817444219066938
-0.9817444219066938 x 100 = -98.17%