-9.82% is the change from 509 to 459
Calculation steps:
[( 459 - 509 ) ÷ 509] x 100 = -9.82%
Formula
Percentage change = [(459 - 509) / 509] x 100
Subtract the new number by the original number
459 - 509 = -50
-50 ÷ 509 = -0.09823182711198428
-0.09823182711198428 x 100 = -9.82%