2.73% is the change from 770 to 791
Calculation steps:
[( 791 - 770 ) ÷ 770] x 100 = 2.73%
Formula
Percentage change = [(791 - 770) / 770] x 100
Subtract the new number by the original number
791 - 770 = 21
21 ÷ 770 = 0.02727272727272727
0.02727272727272727 x 100 = 2.73%