30.9% is the change from 424 to 555
Calculation steps:
[( 555 - 424 ) ÷ 424] x 100 = 30.9%
Formula
Percentage change = [(555 - 424) / 424] x 100
Subtract the new number by the original number
555 - 424 = 131
131 ÷ 424 = 0.3089622641509434
0.3089622641509434 x 100 = 30.9%