-48.68% is the change from 680 to 349
Calculation steps:
[( 349 - 680 ) ÷ 680] x 100 = -48.68%
Formula
Percentage change = [(349 - 680) / 680] x 100
Subtract the new number by the original number
349 - 680 = -331
-331 ÷ 680 = -0.48676470588235293
-0.48676470588235293 x 100 = -48.68%