15.96% is the change from 664 to 770
Calculation steps:
[( 770 - 664 ) ÷ 664] x 100 = 15.96%
Formula
Percentage change = [(770 - 664) / 664] x 100
Subtract the new number by the original number
770 - 664 = 106
106 ÷ 664 = 0.15963855421686746
0.15963855421686746 x 100 = 15.96%