Answer :
[tex]\frac{3}{5}+\frac{7}{8}+\frac{3}{10}[/tex]
Find the least common denominator:
Identify the multiples of each denominator:
[tex]\begin{gathered} 5,10,15,20,25,30,35,40,45 \\ 8,16,24,32,40,48 \\ 10,20,30,40,50 \end{gathered}[/tex]The least common denominator is 40.
Write each equation with that denominator:
[tex]\begin{gathered} =\frac{3\cdot8}{5\cdot8}+\frac{7\cdot5}{8\cdot5}+\frac{3\cdot4}{10\cdot4} \\ \\ =\frac{24}{40}+\frac{35}{40}+\frac{12}{40} \end{gathered}[/tex]Add the fractions:
[tex]\begin{gathered} =\frac{24+35+12}{40} \\ \\ =\frac{71}{40} \end{gathered}[/tex]