-42.35% is the change from 680 to 392
Calculation steps:
[( 392 - 680 ) ÷ 680] x 100 = -42.35%
Formula
Percentage change = [(392 - 680) / 680] x 100
Subtract the new number by the original number
392 - 680 = -288
-288 ÷ 680 = -0.4235294117647059
-0.4235294117647059 x 100 = -42.35%