6.69% is the change from 628 to 670
Calculation steps:
[( 670 - 628 ) ÷ 628] x 100 = 6.69%
Formula
Percentage change = [(670 - 628) / 628] x 100
Subtract the new number by the original number
670 - 628 = 42
42 ÷ 628 = 0.06687898089171974
0.06687898089171974 x 100 = 6.69%