-9.5% is the change from 800 to 724
Calculation steps:
[( 724 - 800 ) ÷ 800] x 100 = -9.5%
Formula
Percentage change = [(724 - 800) / 800] x 100
Subtract the new number by the original number
724 - 800 = -76
-76 ÷ 800 = -0.095
-0.095 x 100 = -9.5%
Example