-30.48% is the change from 456 to 317
Calculation steps:
[( 317 - 456 ) ÷ 456] x 100 = -30.48%
Formula
Percentage change = [(317 - 456) / 456] x 100
Subtract the new number by the original number
317 - 456 = -139
-139 ÷ 456 = -0.3048245614035088
-0.3048245614035088 x 100 = -30.48%