-34.83% is the change from 781 to 509
Calculation steps:
[( 509 - 781 ) ÷ 781] x 100 = -34.83%
Formula
Percentage change = [(509 - 781) / 781] x 100
Subtract the new number by the original number
509 - 781 = -272
-272 ÷ 781 = -0.34827144686299616
-0.34827144686299616 x 100 = -34.83%