-11.74% is the change from 724 to 639
Calculation steps:
[( 639 - 724 ) ÷ 724] x 100 = -11.74%
Formula
Percentage change = [(639 - 724) / 724] x 100
Subtract the new number by the original number
639 - 724 = -85
-85 ÷ 724 = -0.11740331491712708
-0.11740331491712708 x 100 = -11.74%