-27.9% is the change from 706 to 509
Calculation steps:
[( 509 - 706 ) ÷ 706] x 100 = -27.9%
Formula
Percentage change = [(509 - 706) / 706] x 100
Subtract the new number by the original number
509 - 706 = -197
-197 ÷ 706 = -0.2790368271954674
-0.2790368271954674 x 100 = -27.9%