-54.01% is the change from 685 to 315
Calculation steps:
[( 315 - 685 ) ÷ 685] x 100 = -54.01%
Formula
Percentage change = [(315 - 685) / 685] x 100
Subtract the new number by the original number
315 - 685 = -370
-370 ÷ 685 = -0.5401459854014599
-0.5401459854014599 x 100 = -54.01%