15.1% is the change from 669 to 770
Calculation steps:
[( 770 - 669 ) ÷ 669] x 100 = 15.1%
Formula
Percentage change = [(770 - 669) / 669] x 100
Subtract the new number by the original number
770 - 669 = 101
101 ÷ 669 = 0.15097159940209268
0.15097159940209268 x 100 = 15.1%