-11.17% is the change from 815 to 724
Calculation steps:
[( 724 - 815 ) ÷ 815] x 100 = -11.17%
Formula
Percentage change = [(724 - 815) / 815] x 100
Subtract the new number by the original number
724 - 815 = -91
-91 ÷ 815 = -0.1116564417177914
-0.1116564417177914 x 100 = -11.17%