-42.21% is the change from 680 to 393
Calculation steps:
[( 393 - 680 ) ÷ 680] x 100 = -42.21%
Formula
Percentage change = [(393 - 680) / 680] x 100
Subtract the new number by the original number
393 - 680 = -287
-287 ÷ 680 = -0.42205882352941176
-0.42205882352941176 x 100 = -42.21%