Answers

Add 21/15 and 28/45

1^st number: 1 6/15, 2^nd number: 28/45

21/15 + 28/45 is 91/45.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 45 is 45
   
   Next, find the equivalent fraction of both fractional numbers with denominator 45
2. For the 1st fraction, since 15 × 3 = 45,
   21/15 = 21 × 3/15 × 3 = 63/45
3. Likewise, for the 2nd fraction, since 45 × 1 = 45,
   28/45 = 28 × 1/45 × 1 = 28/45
4. Add the two like fractions:
   63/45 + 28/45 = 63 + 28/45 = 91/45
5. So, 21/15 + 28/45 = 91/45
   In mixed form: 21/45

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