-99.02% is the change from 409 to 4
Calculation steps:
[( 4 - 409 ) ÷ 409] x 100 = -99.02%
Formula
Percentage change = [(4 - 409) / 409] x 100
Subtract the new number by the original number
4 - 409 = -405
-405 ÷ 409 = -0.9902200488997555
-0.9902200488997555 x 100 = -99.02%