15.79% is the change from 665 to 770
Calculation steps:
[( 770 - 665 ) ÷ 665] x 100 = 15.79%
Formula
Percentage change = [(770 - 665) / 665] x 100
Subtract the new number by the original number
770 - 665 = 105
105 ÷ 665 = 0.15789473684210525
0.15789473684210525 x 100 = 15.79%