15.71% is the change from 770 to 891
Calculation steps:
[( 891 - 770 ) ÷ 770] x 100 = 15.71%
Formula
Percentage change = [(891 - 770) / 770] x 100
Subtract the new number by the original number
891 - 770 = 121
121 ÷ 770 = 0.15714285714285714
0.15714285714285714 x 100 = 15.71%