Answers

Add 84/21 and 15/72

1^st number: 4 0/21, 2^nd number: 15/72

84/21 + 15/72 is 101/24.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 21 × 24 = 504,
   84/21 = 84 × 24/21 × 24 = 2016/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   15/72 = 15 × 7/72 × 7 = 105/504
4. Add the two like fractions:
   2016/504 + 105/504 = 2016 + 105/504 = 2121/504
5. 2121/504 simplified gives 101/24
6. So, 84/21 + 15/72 = 101/24
   In mixed form: 45/24

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