Answers

Add 63/21 and 54/72

1^st number: 3 0/21, 2^nd number: 54/72

63/21 + 54/72 is 15/4.

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,
   63/21 = 63 × 24/21 × 24 = 1512/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   54/72 = 54 × 7/72 × 7 = 378/504
4. Add the two like fractions:
   1512/504 + 378/504 = 1512 + 378/504 = 1890/504
5. 1890/504 simplified gives 15/4
6. So, 63/21 + 54/72 = 15/4
   In mixed form: 33/4

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