Answers

Add 54/15 and 70/56

1^st number: 3 9/15, 2^nd number: 1 14/56

54/15 + 70/56 is 97/20.

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,
   54/15 = 54 × 56/15 × 56 = 3024/840
3. Likewise, for the 2nd fraction, since 56 × 15 = 840,
   70/56 = 70 × 15/56 × 15 = 1050/840
4. Add the two like fractions:
   3024/840 + 1050/840 = 3024 + 1050/840 = 4074/840
5. 4074/840 simplified gives 97/20
6. So, 54/15 + 70/56 = 97/20
   In mixed form: 417/20

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