-29.56% is the change from 450 to 317
Calculation steps:
[( 317 - 450 ) ÷ 450] x 100 = -29.56%
Formula
Percentage change = [(317 - 450) / 450] x 100
Subtract the new number by the original number
317 - 450 = -133
-133 ÷ 450 = -0.29555555555555557
-0.29555555555555557 x 100 = -29.56%