-99.27% is the change from 409 to 3
Calculation steps:
[( 3 - 409 ) ÷ 409] x 100 = -99.27%
Formula
Percentage change = [(3 - 409) / 409] x 100
Subtract the new number by the original number
3 - 409 = -406
-406 ÷ 409 = -0.9926650366748166
-0.9926650366748166 x 100 = -99.27%