-93.11% is the change from 450 to 31
Calculation steps:
[( 31 - 450 ) ÷ 450] x 100 = -93.11%
Formula
Percentage change = [(31 - 450) / 450] x 100
Subtract the new number by the original number
31 - 450 = -419
-419 ÷ 450 = -0.9311111111111111
-0.9311111111111111 x 100 = -93.11%