Answers

Add 63/42 and 3/90

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

63/42 + 3/90 is 23/15.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 42 × 15 = 630,
   63/42 = 63 × 15/42 × 15 = 945/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   3/90 = 3 × 7/90 × 7 = 21/630
4. Add the two like fractions:
   945/630 + 21/630 = 945 + 21/630 = 966/630
5. 966/630 simplified gives 23/15
6. So, 63/42 + 3/90 = 23/15
   In mixed form: 18/15

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