6.36% is the change from 770 to 819
Calculation steps:
[( 819 - 770 ) ÷ 770] x 100 = 6.36%
Formula
Percentage change = [(819 - 770) / 770] x 100
Subtract the new number by the original number
819 - 770 = 49
49 ÷ 770 = 0.06363636363636363
0.06363636363636363 x 100 = 6.36%