Answers

Add 21/7 and 15/72

1^st number: 3 0/7, 2^nd number: 15/72

21/7 + 15/72 is 77/24.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 7 × 72 = 504,
   21/7 = 21 × 72/7 × 72 = 1512/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   15/72 = 15 × 7/72 × 7 = 105/504
4. Add the two like fractions:
   1512/504 + 105/504 = 1512 + 105/504 = 1617/504
5. 1617/504 simplified gives 77/24
6. So, 21/7 + 15/72 = 77/24
   In mixed form: 35/24

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