-36.14% is the change from 797 to 509
Calculation steps:
[( 509 - 797 ) ÷ 797] x 100 = -36.14%
Formula
Percentage change = [(509 - 797) / 797] x 100
Subtract the new number by the original number
509 - 797 = -288
-288 ÷ 797 = -0.3613550815558344
-0.3613550815558344 x 100 = -36.14%