-92.42% is the change from 409 to 31
Calculation steps:
[( 31 - 409 ) ÷ 409] x 100 = -92.42%
Formula
Percentage change = [(31 - 409) / 409] x 100
Subtract the new number by the original number
31 - 409 = -378
-378 ÷ 409 = -0.9242053789731052
-0.9242053789731052 x 100 = -92.42%