-11% is the change from 509 to 453
Calculation steps:
[( 453 - 509 ) ÷ 509] x 100 = -11%
Formula
Percentage change = [(453 - 509) / 509] x 100
Subtract the new number by the original number
453 - 509 = -56
-56 ÷ 509 = -0.1100196463654224
-0.1100196463654224 x 100 = -11%