Answers

Add 45/42 and 7/90

1^st number: 1 3/42, 2^nd number: 7/90

45/42 + 7/90 is 362/315.

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,
   45/42 = 45 × 15/42 × 15 = 675/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   7/90 = 7 × 7/90 × 7 = 49/630
4. Add the two like fractions:
   675/630 + 49/630 = 675 + 49/630 = 724/630
5. 724/630 simplified gives 362/315
6. So, 45/42 + 7/90 = 362/315
   In mixed form: 147/315

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