-12.36% is the change from 639 to 560
Calculation steps:
[( 560 - 639 ) ÷ 639] x 100 = -12.36%
Formula
Percentage change = [(560 - 639) / 639] x 100
Subtract the new number by the original number
560 - 639 = -79
-79 ÷ 639 = -0.12363067292644757
-0.12363067292644757 x 100 = -12.36%