-92.4% is the change from 408 to 31
Calculation steps:
[( 31 - 408 ) ÷ 408] x 100 = -92.4%
Formula
Percentage change = [(31 - 408) / 408] x 100
Subtract the new number by the original number
31 - 408 = -377
-377 ÷ 408 = -0.9240196078431373
-0.9240196078431373 x 100 = -92.4%