Answers

Add 63/21 and 27/90

1^st number: 3 0/21, 2^nd number: 27/90

63/21 + 27/90 is 33/10.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 21 × 30 = 630,
   63/21 = 63 × 30/21 × 30 = 1890/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   27/90 = 27 × 7/90 × 7 = 189/630
4. Add the two like fractions:
   1890/630 + 189/630 = 1890 + 189/630 = 2079/630
5. 2079/630 simplified gives 33/10
6. So, 63/21 + 27/90 = 33/10
   In mixed form: 33/10

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