-51.91% is the change from 655 to 315
Calculation steps:
[( 315 - 655 ) ÷ 655] x 100 = -51.91%
Formula
Percentage change = [(315 - 655) / 655] x 100
Subtract the new number by the original number
315 - 655 = -340
-340 ÷ 655 = -0.5190839694656488
-0.5190839694656488 x 100 = -51.91%