-13.56% is the change from 509 to 440
Calculation steps:
[( 440 - 509 ) ÷ 509] x 100 = -13.56%
Formula
Percentage change = [(440 - 509) / 509] x 100
Subtract the new number by the original number
440 - 509 = -69
-69 ÷ 509 = -0.13555992141453832
-0.13555992141453832 x 100 = -13.56%