Answers

Add 63/42 and 70/45

1^st number: 1 21/42, 2^nd number: 1 25/45

63/42 + 70/45 is 55/18.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 45 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 45 × 14 = 630,
   70/45 = 70 × 14/45 × 14 = 980/630
4. Add the two like fractions:
   945/630 + 980/630 = 945 + 980/630 = 1925/630
5. 1925/630 simplified gives 55/18
6. So, 63/42 + 70/45 = 55/18
   In mixed form: 31/18

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