6.4% is the change from 766 to 815
Calculation steps:
[( 815 - 766 ) ÷ 766] x 100 = 6.4%
Formula
Percentage change = [(815 - 766) / 766] x 100
Subtract the new number by the original number
815 - 766 = 49
49 ÷ 766 = 0.0639686684073107
0.0639686684073107 x 100 = 6.4%