Answers

Add 56/15 and 40/84

1^st number: 3 11/15, 2^nd number: 40/84

56/15 + 40/84 is 442/105.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 84 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 15 × 28 = 420,
   56/15 = 56 × 28/15 × 28 = 1568/420
3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
   40/84 = 40 × 5/84 × 5 = 200/420
4. Add the two like fractions:
   1568/420 + 200/420 = 1568 + 200/420 = 1768/420
5. 1768/420 simplified gives 442/105
6. So, 56/15 + 40/84 = 442/105
   In mixed form: 422/105

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