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15 and 5/8 = 125/8

7 and 2/5=37/2 x4=148/8

125/8 +148/8= 273/8

273/8= 34 and 1/8

You have to change them to improper fraction first then change the denominators into a number they both have in common (8 was the number). Now you add both improper fractions and then take them both and change it to a mixed fraction.

Final Answer: Thirty four and one eigths.

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15y ago

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