Answers

Add 70/12 and 90/35

1^st number: 5 10/12, 2^nd number: 2 20/35

70/12 + 90/35 is 353/42.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 35 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 12 × 35 = 420,
   70/12 = 70 × 35/12 × 35 = 2450/420
3. Likewise, for the 2nd fraction, since 35 × 12 = 420,
   90/35 = 90 × 12/35 × 12 = 1080/420
4. Add the two like fractions:
   2450/420 + 1080/420 = 2450 + 1080/420 = 3530/420
5. 3530/420 simplified gives 353/42
6. So, 70/12 + 90/35 = 353/42
   In mixed form: 817/42

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