The percentage difference between two numbers is given by the formula below
[tex]\begin{gathered} D=\frac{|x_1-x_2|}{(\frac{x_1+x_2}{2})}*100 \\ x_1,x_2\rightarrow\text{ two involved numbers} \end{gathered}[/tex]Thus, in our case,
[tex]\begin{gathered} x_1=1982802.9,x_2=1786170.42 \\ \Rightarrow D=\frac{|196632.48|}{(\frac{3768973.32}{2})}*100 \\ \Rightarrow D=10.4342... \end{gathered}[/tex]