14.93% is the change from 670 to 770
Calculation steps:
[( 770 - 670 ) ÷ 670] x 100 = 14.93%
Formula
Percentage change = [(770 - 670) / 670] x 100
Subtract the new number by the original number
770 - 670 = 100
100 ÷ 670 = 0.14925373134328357
0.14925373134328357 x 100 = 14.93%