-36.77% is the change from 805 to 509
Calculation steps:
[( 509 - 805 ) ÷ 805] x 100 = -36.77%
Formula
Percentage change = [(509 - 805) / 805] x 100
Subtract the new number by the original number
509 - 805 = -296
-296 ÷ 805 = -0.36770186335403726
-0.36770186335403726 x 100 = -36.77%