Answers

Add 80/15 and 90/56

1^st number: 5 5/15, 2^nd number: 1 34/56

80/15 + 90/56 is 583/84.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 56 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 15 × 56 = 840,
   80/15 = 80 × 56/15 × 56 = 4480/840
3. Likewise, for the 2nd fraction, since 56 × 15 = 840,
   90/56 = 90 × 15/56 × 15 = 1350/840
4. Add the two like fractions:
   4480/840 + 1350/840 = 4480 + 1350/840 = 5830/840
5. 5830/840 simplified gives 583/84
6. So, 80/15 + 90/56 = 583/84
   In mixed form: 679/84

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