Answers

Add 30/21 and 63/72

1^st number: 1 9/21, 2^nd number: 63/72

30/21 + 63/72 is 129/56.

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,
   30/21 = 30 × 24/21 × 24 = 720/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   63/72 = 63 × 7/72 × 7 = 441/504
4. Add the two like fractions:
   720/504 + 441/504 = 720 + 441/504 = 1161/504
5. 1161/504 simplified gives 129/56
6. So, 30/21 + 63/72 = 129/56
   In mixed form: 217/56

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