-29.41% is the change from 680 to 480
Calculation steps:
[( 480 - 680 ) ÷ 680] x 100 = -29.41%
Formula
Percentage change = [(480 - 680) / 680] x 100
Subtract the new number by the original number
480 - 680 = -200
-200 ÷ 680 = -0.29411764705882354
-0.29411764705882354 x 100 = -29.41%