-29.7% is the change from 724 to 509
Calculation steps:
[( 509 - 724 ) ÷ 724] x 100 = -29.7%
Formula
Percentage change = [(509 - 724) / 724] x 100
Subtract the new number by the original number
509 - 724 = -215
-215 ÷ 724 = -0.2969613259668508
-0.2969613259668508 x 100 = -29.7%