Answers

Add 63/3 and 45/72

1^st number: 21 0/3, 2^nd number: 45/72

63/3 + 45/72 is 173/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 3 and 72 is 72
   
   Next, find the equivalent fraction of both fractional numbers with denominator 72
2. For the 1st fraction, since 3 × 24 = 72,
   63/3 = 63 × 24/3 × 24 = 1512/72
3. Likewise, for the 2nd fraction, since 72 × 1 = 72,
   45/72 = 45 × 1/72 × 1 = 45/72
4. Add the two like fractions:
   1512/72 + 45/72 = 1512 + 45/72 = 1557/72
5. 1557/72 simplified gives 173/8
6. So, 63/3 + 45/72 = 173/8
   In mixed form: 215/8

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