-9.23% is the change from 509 to 462
Calculation steps:
[( 462 - 509 ) ÷ 509] x 100 = -9.23%
Formula
Percentage change = [(462 - 509) / 509] x 100
Subtract the new number by the original number
462 - 509 = -47
-47 ÷ 509 = -0.09233791748526522
-0.09233791748526522 x 100 = -9.23%