1.23% is the change from 813 to 823
Calculation steps:
[( 823 - 813 ) ÷ 813] x 100 = 1.23%
Formula
Percentage change = [(823 - 813) / 813] x 100
Subtract the new number by the original number
823 - 813 = 10
10 ÷ 813 = 0.012300123001230012
0.012300123001230012 x 100 = 1.23%