20.78% is the change from 770 to 930
Calculation steps:
[( 930 - 770 ) ÷ 770] x 100 = 20.78%
Formula
Percentage change = [(930 - 770) / 770] x 100
Subtract the new number by the original number
930 - 770 = 160
160 ÷ 770 = 0.2077922077922078
0.2077922077922078 x 100 = 20.78%