-49.85% is the change from 680 to 341
Calculation steps:
[( 341 - 680 ) ÷ 680] x 100 = -49.85%
Formula
Percentage change = [(341 - 680) / 680] x 100
Subtract the new number by the original number
341 - 680 = -339
-339 ÷ 680 = -0.4985294117647059
-0.4985294117647059 x 100 = -49.85%