-54.45% is the change from 685 to 312
Calculation steps:
[( 312 - 685 ) ÷ 685] x 100 = -54.45%
Formula
Percentage change = [(312 - 685) / 685] x 100
Subtract the new number by the original number
312 - 685 = -373
-373 ÷ 685 = -0.5445255474452555
-0.5445255474452555 x 100 = -54.45%