Question 765056
Two ways:


3 11/15 + 4 7/15
= 56/15 + 67/15 {changed to improper fractions}
= 123/15 {combined numerators over common denominator}
= 8 3/15 {changed to mixed number}
= 8 1/5 {reduced}

or


3 11/15 + 4 7/15
= 7 18/15 {combined numerators over common denominator}
= 8 3/15 {simplified}
= 8 1/5 {reduced}
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