-11.6% is the change from 724 to 640
Calculation steps:
[( 640 - 724 ) ÷ 724] x 100 = -11.6%
Formula
Percentage change = [(640 - 724) / 724] x 100
Subtract the new number by the original number
640 - 724 = -84
-84 ÷ 724 = -0.11602209944751381
-0.11602209944751381 x 100 = -11.6%