56.07% is the change from 428 to 668
Calculation steps:
[( 668 - 428 ) ÷ 428] x 100 = 56.07%
Formula
Percentage change = [(668 - 428) / 428] x 100
Subtract the new number by the original number
668 - 428 = 240
240 ÷ 428 = 0.5607476635514018
0.5607476635514018 x 100 = 56.07%