-12.35% is the change from 510 to 447
Calculation steps:
[( 447 - 510 ) ÷ 510] x 100 = -12.35%
Formula
Percentage change = [(447 - 510) / 510] x 100
Subtract the new number by the original number
447 - 510 = -63
-63 ÷ 510 = -0.12352941176470589
-0.12352941176470589 x 100 = -12.35%