-12.18% is the change from 509 to 447
Calculation steps:
[( 447 - 509 ) ÷ 509] x 100 = -12.18%
Formula
Percentage change = [(447 - 509) / 509] x 100
Subtract the new number by the original number
447 - 509 = -62
-62 ÷ 509 = -0.12180746561886051
-0.12180746561886051 x 100 = -12.18%