-46.15% is the change from 585 to 315
Calculation steps:
[( 315 - 585 ) ÷ 585] x 100 = -46.15%
Formula
Percentage change = [(315 - 585) / 585] x 100
Subtract the new number by the original number
315 - 585 = -270
-270 ÷ 585 = -0.46153846153846156
-0.46153846153846156 x 100 = -46.15%