-6.27% is the change from 510 to 478
Calculation steps:
[( 478 - 510 ) ÷ 510] x 100 = -6.27%
Formula
Percentage change = [(478 - 510) / 510] x 100
Subtract the new number by the original number
478 - 510 = -32
-32 ÷ 510 = -0.06274509803921569
-0.06274509803921569 x 100 = -6.27%