18.64% is the change from 649 to 770
Calculation steps:
[( 770 - 649 ) ÷ 649] x 100 = 18.64%
Formula
Percentage change = [(770 - 649) / 649] x 100
Subtract the new number by the original number
770 - 649 = 121
121 ÷ 649 = 0.1864406779661017
0.1864406779661017 x 100 = 18.64%