-92.67% is the change from 409 to 30
Calculation steps:
[( 30 - 409 ) ÷ 409] x 100 = -92.67%
Formula
Percentage change = [(30 - 409) / 409] x 100
Subtract the new number by the original number
30 - 409 = -379
-379 ÷ 409 = -0.9266503667481663
-0.9266503667481663 x 100 = -92.67%