-99.19% is the change from 493 to 4
Calculation steps:
[( 4 - 493 ) ÷ 493] x 100 = -99.19%
Formula
Percentage change = [(4 - 493) / 493] x 100
Subtract the new number by the original number
4 - 493 = -489
-489 ÷ 493 = -0.9918864097363083
-0.9918864097363083 x 100 = -99.19%