2.43% is the change from 823 to 843
Calculation steps:
[( 843 - 823 ) ÷ 823] x 100 = 2.43%
Formula
Percentage change = [(843 - 823) / 823] x 100
Subtract the new number by the original number
843 - 823 = 20
20 ÷ 823 = 0.024301336573511544
0.024301336573511544 x 100 = 2.43%