6.1% is the change from 770 to 817
Calculation steps:
[( 817 - 770 ) ÷ 770] x 100 = 6.1%
Formula
Percentage change = [(817 - 770) / 770] x 100
Subtract the new number by the original number
817 - 770 = 47
47 ÷ 770 = 0.06103896103896104
0.06103896103896104 x 100 = 6.1%