-54.71% is the change from 680 to 308
Calculation steps:
[( 308 - 680 ) ÷ 680] x 100 = -54.71%
Formula
Percentage change = [(308 - 680) / 680] x 100
Subtract the new number by the original number
308 - 680 = -372
-372 ÷ 680 = -0.5470588235294118
-0.5470588235294118 x 100 = -54.71%