Answers

Add 24/21 and 4/15

1^st number: 1 3/21, 2^nd number: 4/15

24/21 + 4/15 is 148/105.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 15 is 105
   
   Next, find the equivalent fraction of both fractional numbers with denominator 105
2. For the 1st fraction, since 21 × 5 = 105,
   24/21 = 24 × 5/21 × 5 = 120/105
3. Likewise, for the 2nd fraction, since 15 × 7 = 105,
   4/15 = 4 × 7/15 × 7 = 28/105
4. Add the two like fractions:
   120/105 + 28/105 = 120 + 28/105 = 148/105
5. So, 24/21 + 4/15 = 148/105
   In mixed form: 143/105

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