56.54% is the change from 428 to 670
Calculation steps:
[( 670 - 428 ) ÷ 428] x 100 = 56.54%
Formula
Percentage change = [(670 - 428) / 428] x 100
Subtract the new number by the original number
670 - 428 = 242
242 ÷ 428 = 0.5654205607476636
0.5654205607476636 x 100 = 56.54%