8.57% is the change from 770 to 836
Calculation steps:
[( 836 - 770 ) ÷ 770] x 100 = 8.57%
Formula
Percentage change = [(836 - 770) / 770] x 100
Subtract the new number by the original number
836 - 770 = 66
66 ÷ 770 = 0.08571428571428572
0.08571428571428572 x 100 = 8.57%