-99.39% is the change from 493 to 3
Calculation steps:
[( 3 - 493 ) ÷ 493] x 100 = -99.39%
Formula
Percentage change = [(3 - 493) / 493] x 100
Subtract the new number by the original number
3 - 493 = -490
-490 ÷ 493 = -0.9939148073022313
-0.9939148073022313 x 100 = -99.39%