Answer :

konrad509
[tex]\dfrac{3}{5}+\dfrac{7}{8}=\\ \dfrac{24}{40}+\dfrac{35}{40}=\\ \dfrac{59}{40}[/tex]
first you need to get the common denominator my multiply something like this 
3/5 * 8/8= 24/40
7/8 * 5/5= 35/40
now that we got a common denominator we can add
24/40 + 35/40 = 59/40 turned to the simplest form it would be 1_19/40
hope this helps

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