Answers

Add 81/15 and 20/56

1^st number: 5 6/15, 2^nd number: 20/56

81/15 + 20/56 is 403/70.

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,
   81/15 = 81 × 56/15 × 56 = 4536/840
3. Likewise, for the 2nd fraction, since 56 × 15 = 840,
   20/56 = 20 × 15/56 × 15 = 300/840
4. Add the two like fractions:
   4536/840 + 300/840 = 4536 + 300/840 = 4836/840
5. 4836/840 simplified gives 403/70
6. So, 81/15 + 20/56 = 403/70
   In mixed form: 553/70

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