15.66% is the change from 664 to 768
Calculation steps:
[( 768 - 664 ) ÷ 664] x 100 = 15.66%
Formula
Percentage change = [(768 - 664) / 664] x 100
Subtract the new number by the original number
768 - 664 = 104
104 ÷ 664 = 0.1566265060240964
0.1566265060240964 x 100 = 15.66%