3.93% is the change from 789 to 820
Calculation steps:
[( 820 - 789 ) ÷ 789] x 100 = 3.93%
Formula
Percentage change = [(820 - 789) / 789] x 100
Subtract the new number by the original number
820 - 789 = 31
31 ÷ 789 = 0.03929024081115336
0.03929024081115336 x 100 = 3.93%