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Add 90/8 and 20/42

1st number: 11 2/8, 2nd number: 20/42

90/8 + 20/42 is 985/84.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 42 is 168
  2. For the 1st fraction, since 8 × 21 = 168,
    90/8 = 90 × 21/8 × 21 = 1890/168
  3. Likewise, for the 2nd fraction, since 42 × 4 = 168,
    20/42 = 20 × 4/42 × 4 = 80/168
  4. Add the two fractions:
    1890/168 + 80/168 = 1890 + 80/168 = 1970/168
  5. 1970/168 simplified gives 985/84
  6. So, 90/8 + 20/42 = 985/84
    In mixed form: 1161/84

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