-10.77% is the change from 724 to 646
Calculation steps:
[( 646 - 724 ) ÷ 724] x 100 = -10.77%
Formula
Percentage change = [(646 - 724) / 724] x 100
Subtract the new number by the original number
646 - 724 = -78
-78 ÷ 724 = -0.10773480662983426
-0.10773480662983426 x 100 = -10.77%