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Add 90/8 and 15/70

1st number: 11 2/8, 2nd number: 15/70

90/8 + 15/70 is 321/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 70 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 8 × 35 = 280,
    90/8 = 90 × 35/8 × 35 = 3150/280
  3. Likewise, for the 2nd fraction, since 70 × 4 = 280,
    15/70 = 15 × 4/70 × 4 = 60/280
  4. Add the two like fractions:
    3150/280 + 60/280 = 3150 + 60/280 = 3210/280
  5. 3210/280 simplified gives 321/28
  6. So, 90/8 + 15/70 = 321/28
    In mixed form: 1113/28

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