-29.71% is the change from 680 to 478
Calculation steps:
[( 478 - 680 ) ÷ 680] x 100 = -29.71%
Formula
Percentage change = [(478 - 680) / 680] x 100
Subtract the new number by the original number
478 - 680 = -202
-202 ÷ 680 = -0.29705882352941176
-0.29705882352941176 x 100 = -29.71%