2.8% is the change from 821 to 844
Calculation steps:
[( 844 - 821 ) ÷ 821] x 100 = 2.8%
Formula
Percentage change = [(844 - 821) / 821] x 100
Subtract the new number by the original number
844 - 821 = 23
23 ÷ 821 = 0.028014616321559074
0.028014616321559074 x 100 = 2.8%