-29.01% is the change from 717 to 509
Calculation steps:
[( 509 - 717 ) ÷ 717] x 100 = -29.01%
Formula
Percentage change = [(509 - 717) / 717] x 100
Subtract the new number by the original number
509 - 717 = -208
-208 ÷ 717 = -0.2900976290097629
-0.2900976290097629 x 100 = -29.01%