8.6% is the change from 709 to 770
Calculation steps:
[( 770 - 709 ) ÷ 709] x 100 = 8.6%
Formula
Percentage change = [(770 - 709) / 709] x 100
Subtract the new number by the original number
770 - 709 = 61
61 ÷ 709 = 0.08603667136812412
0.08603667136812412 x 100 = 8.6%