Answers

Add 90/18 and 40/35

1^st number: 5 0/18, 2^nd number: 1 5/35

90/18 + 40/35 is 43/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 35 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 18 × 35 = 630,
   90/18 = 90 × 35/18 × 35 = 3150/630
3. Likewise, for the 2nd fraction, since 35 × 18 = 630,
   40/35 = 40 × 18/35 × 18 = 720/630
4. Add the two like fractions:
   3150/630 + 720/630 = 3150 + 720/630 = 3870/630
5. 3870/630 simplified gives 43/7
6. So, 90/18 + 40/35 = 43/7
   In mixed form: 61/7

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