-28.81% is the change from 715 to 509
Calculation steps:
[( 509 - 715 ) ÷ 715] x 100 = -28.81%
Formula
Percentage change = [(509 - 715) / 715] x 100
Subtract the new number by the original number
509 - 715 = -206
-206 ÷ 715 = -0.2881118881118881
-0.2881118881118881 x 100 = -28.81%