15.91% is the change from 660 to 765
Calculation steps:
[( 765 - 660 ) ÷ 660] x 100 = 15.91%
Formula
Percentage change = [(765 - 660) / 660] x 100
Subtract the new number by the original number
765 - 660 = 105
105 ÷ 660 = 0.1590909090909091
0.1590909090909091 x 100 = 15.91%