Answers

Add 21/15 and 35/12

1^st number: 1 6/15, 2^nd number: 2 11/12

21/15 + 35/12 is 259/60.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 12 is 60
   
   Next, find the equivalent fraction of both fractional numbers with denominator 60
2. For the 1st fraction, since 15 × 4 = 60,
   21/15 = 21 × 4/15 × 4 = 84/60
3. Likewise, for the 2nd fraction, since 12 × 5 = 60,
   35/12 = 35 × 5/12 × 5 = 175/60
4. Add the two like fractions:
   84/60 + 175/60 = 84 + 175/60 = 259/60
5. So, 21/15 + 35/12 = 259/60
   In mixed form: 419/60

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