[tex]2\dfrac{3}{4}+5\dfrac{1}{2}+4\dfrac{2}{3}[/tex]
[tex]\text{find common denominator}\\\\4, 2\ and\ 3\\\text{common denominator is equal 12}[/tex]
[tex]\dfrac{3}{4}=\dfrac{3\cdot3}{4\cdot3}=\dfrac{9}{12}\\\\\dfrac{1}{2}=\dfrac{1\cdot6}{2\cdot6}=\dfrac{6}{12}\\\\\dfrac{2}{3}=\dfrac{2\cdot4}{3\cdot4}=\dfrac{8}{12}[/tex]
[tex]\text{we have}\\\\2\dfrac{2}{4}+5\dfrac{1}{2}+4\dfrac{2}{3}=2\dfrac{9}{12}+5\dfrac{6}{12}+4\dfrac{8}{12}\\\\=(2+5+4)+\dfrac{9+6+8}{12}=11\dfrac{23}{12}=12\dfrac{11}{12}[/tex]
[tex]Answer:\ 12\dfrac{11}{12}\ miles\ \text{therefore the total number of miles}\\\text{he walked during the three days is 12miles}[/tex]
