Answers

Add 63/3 and 81/90

1^st number: 21 0/3, 2^nd number: 81/90

63/3 + 81/90 is 219/10.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 3 and 90 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 3 × 30 = 90,
   63/3 = 63 × 30/3 × 30 = 1890/90
3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
   81/90 = 81 × 1/90 × 1 = 81/90
4. Add the two like fractions:
   1890/90 + 81/90 = 1890 + 81/90 = 1971/90
5. 1971/90 simplified gives 219/10
6. So, 63/3 + 81/90 = 219/10
   In mixed form: 219/10

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