54.21% is the change from 428 to 660
Calculation steps:
[( 660 - 428 ) ÷ 428] x 100 = 54.21%
Formula
Percentage change = [(660 - 428) / 428] x 100
Subtract the new number by the original number
660 - 428 = 232
232 ÷ 428 = 0.5420560747663551
0.5420560747663551 x 100 = 54.21%