7.61% is the change from 670 to 721
Calculation steps:
[( 721 - 670 ) ÷ 670] x 100 = 7.61%
Formula
Percentage change = [(721 - 670) / 670] x 100
Subtract the new number by the original number
721 - 670 = 51
51 ÷ 670 = 0.07611940298507462
0.07611940298507462 x 100 = 7.61%