Answers

Add 12/42 and 90/45

1^st number: 12/42, 2^nd number: 2 0/45

12/42 + 90/45 is 16/7.

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,
   12/42 = 12 × 15/42 × 15 = 180/630
3. Likewise, for the 2nd fraction, since 45 × 14 = 630,
   90/45 = 90 × 14/45 × 14 = 1260/630
4. Add the two like fractions:
   180/630 + 1260/630 = 180 + 1260/630 = 1440/630
5. 1440/630 simplified gives 16/7
6. So, 12/42 + 90/45 = 16/7
   In mixed form: 22/7

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