4.36% is the change from 642 to 670
Calculation steps:
[( 670 - 642 ) ÷ 642] x 100 = 4.36%
Formula
Percentage change = [(670 - 642) / 642] x 100
Subtract the new number by the original number
670 - 642 = 28
28 ÷ 642 = 0.04361370716510903
0.04361370716510903 x 100 = 4.36%