7.31% is the change from 424 to 455
Calculation steps:
[( 455 - 424 ) ÷ 424] x 100 = 7.31%
Formula
Percentage change = [(455 - 424) / 424] x 100
Subtract the new number by the original number
455 - 424 = 31
31 ÷ 424 = 0.07311320754716981
0.07311320754716981 x 100 = 7.31%