8.21% is the change from 670 to 725
Calculation steps:
[( 725 - 670 ) ÷ 670] x 100 = 8.21%
Formula
Percentage change = [(725 - 670) / 670] x 100
Subtract the new number by the original number
725 - 670 = 55
55 ÷ 670 = 0.08208955223880597
0.08208955223880597 x 100 = 8.21%