-27.35% is the change from 680 to 494
Calculation steps:
[( 494 - 680 ) ÷ 680] x 100 = -27.35%
Formula
Percentage change = [(494 - 680) / 680] x 100
Subtract the new number by the original number
494 - 680 = -186
-186 ÷ 680 = -0.2735294117647059
-0.2735294117647059 x 100 = -27.35%