1.1% is the change from 820 to 829
Calculation steps:
[( 829 - 820 ) ÷ 820] x 100 = 1.1%
Formula
Percentage change = [(829 - 820) / 820] x 100
Subtract the new number by the original number
829 - 820 = 9
9 ÷ 820 = 0.01097560975609756
0.01097560975609756 x 100 = 1.1%