2.55% is the change from 823 to 844
Calculation steps:
[( 844 - 823 ) ÷ 823] x 100 = 2.55%
Formula
Percentage change = [(844 - 823) / 823] x 100
Subtract the new number by the original number
844 - 823 = 21
21 ÷ 823 = 0.02551640340218712
0.02551640340218712 x 100 = 2.55%