-12.55% is the change from 510 to 446
Calculation steps:
[( 446 - 510 ) ÷ 510] x 100 = -12.55%
Formula
Percentage change = [(446 - 510) / 510] x 100
Subtract the new number by the original number
446 - 510 = -64
-64 ÷ 510 = -0.12549019607843137
-0.12549019607843137 x 100 = -12.55%