Answers

Add 90/18 and 80/70

1^st number: 5 0/18, 2^nd number: 1 10/70

90/18 + 80/70 is 43/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 70 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 70 × 9 = 630,
   80/70 = 80 × 9/70 × 9 = 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 + 80/70 = 43/7
   In mixed form: 61/7

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