Answers

Add 63/3 and 42/90

1^st number: 21 0/3, 2^nd number: 42/90

63/3 + 42/90 is 322/15.

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,
   42/90 = 42 × 1/90 × 1 = 42/90
4. Add the two like fractions:
   1890/90 + 42/90 = 1890 + 42/90 = 1932/90
5. 1932/90 simplified gives 322/15
6. So, 63/3 + 42/90 = 322/15
   In mixed form: 217/15

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