-13.09% is the change from 680 to 591
Calculation steps:
[( 591 - 680 ) ÷ 680] x 100 = -13.09%
Formula
Percentage change = [(591 - 680) / 680] x 100
Subtract the new number by the original number
591 - 680 = -89
-89 ÷ 680 = -0.13088235294117648
-0.13088235294117648 x 100 = -13.09%