-73.53% is the change from 680 to 180
Calculation steps:
[( 180 - 680 ) ÷ 680] x 100 = -73.53%
Formula
Percentage change = [(180 - 680) / 680] x 100
Subtract the new number by the original number
180 - 680 = -500
-500 ÷ 680 = -0.7352941176470589
-0.7352941176470589 x 100 = -73.53%