3.69% is the change from 813 to 843
Calculation steps:
[( 843 - 813 ) ÷ 813] x 100 = 3.69%
Formula
Percentage change = [(843 - 813) / 813] x 100
Subtract the new number by the original number
843 - 813 = 30
30 ÷ 813 = 0.03690036900369004
0.03690036900369004 x 100 = 3.69%