Answers

Add 21/15 and 4/21

1^st number: 1 6/15, 2^nd number: 4/21

21/15 + 4/21 is 167/105.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 21 is 105
   
   Next, find the equivalent fraction of both fractional numbers with denominator 105
2. For the 1st fraction, since 15 × 7 = 105,
   21/15 = 21 × 7/15 × 7 = 147/105
3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
   4/21 = 4 × 5/21 × 5 = 20/105
4. Add the two like fractions:
   147/105 + 20/105 = 147 + 20/105 = 167/105
5. So, 21/15 + 4/21 = 167/105
   In mixed form: 162/105

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