Answers

Add 90/70 and 90/8

1^st number: 1 20/70, 2^nd number: 11 2/8

90/70 + 90/8 is 351/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 8 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 70 × 4 = 280,
   90/70 = 90 × 4/70 × 4 = 360/280
3. Likewise, for the 2nd fraction, since 8 × 35 = 280,
   90/8 = 90 × 35/8 × 35 = 3150/280
4. Add the two like fractions:
   360/280 + 3150/280 = 360 + 3150/280 = 3510/280
5. 3510/280 simplified gives 351/28
6. So, 90/70 + 90/8 = 351/28
   In mixed form: 1215/28

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