6.9% is the change from 478 to 511
Calculation steps:
[( 511 - 478 ) ÷ 478] x 100 = 6.9%
Formula
Percentage change = [(511 - 478) / 478] x 100
Subtract the new number by the original number
511 - 478 = 33
33 ÷ 478 = 0.06903765690376569
0.06903765690376569 x 100 = 6.9%