6.31% is the change from 428 to 455
Calculation steps:
[( 455 - 428 ) ÷ 428] x 100 = 6.31%
Formula
Percentage change = [(455 - 428) / 428] x 100
Subtract the new number by the original number
455 - 428 = 27
27 ÷ 428 = 0.0630841121495327
0.0630841121495327 x 100 = 6.31%