13.54% is the change from 421 to 478
Calculation steps:
[( 478 - 421 ) ÷ 421] x 100 = 13.54%
Formula
Percentage change = [(478 - 421) / 421] x 100
Subtract the new number by the original number
478 - 421 = 57
57 ÷ 421 = 0.13539192399049882
0.13539192399049882 x 100 = 13.54%