-15.7% is the change from 688 to 580
Calculation steps:
[( 580 - 688 ) ÷ 688] x 100 = -15.7%
Formula
Percentage change = [(580 - 688) / 688] x 100
Subtract the new number by the original number
580 - 688 = -108
-108 ÷ 688 = -0.1569767441860465
-0.1569767441860465 x 100 = -15.7%