Answers

Add 21/5 and 80/7

1^st number: 4 1/5, 2^nd number: 11 3/7

21/5 + 80/7 is 547/35.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 7 is 35
   
   Next, find the equivalent fraction of both fractional numbers with denominator 35
2. For the 1st fraction, since 5 × 7 = 35,
   21/5 = 21 × 7/5 × 7 = 147/35
3. Likewise, for the 2nd fraction, since 7 × 5 = 35,
   80/7 = 80 × 5/7 × 5 = 400/35
4. Add the two like fractions:
   147/35 + 400/35 = 147 + 400/35 = 547/35
5. So, 21/5 + 80/7 = 547/35
   In mixed form: 1522/35

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