-10.44% is the change from 680 to 609
Calculation steps:
[( 609 - 680 ) ÷ 680] x 100 = -10.44%
Formula
Percentage change = [(609 - 680) / 680] x 100
Subtract the new number by the original number
609 - 680 = -71
-71 ÷ 680 = -0.10441176470588236
-0.10441176470588236 x 100 = -10.44%