4.48% is the change from 670 to 700
Calculation steps:
[( 700 - 670 ) ÷ 670] x 100 = 4.48%
Formula
Percentage change = [(700 - 670) / 670] x 100
Subtract the new number by the original number
700 - 670 = 30
30 ÷ 670 = 0.04477611940298507
0.04477611940298507 x 100 = 4.48%