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Add 84/42 and 6/90

1st number: 2 0/42, 2nd number: 6/90

84/42 + 6/90 is 31/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 90 is 630
  2. For the 1st fraction, since 42 × 15 = 630,
    84/42 = 84 × 15/42 × 15 = 1260/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    6/90 = 6 × 7/90 × 7 = 42/630
  4. Add the two fractions:
    1260/630 + 42/630 = 1260 + 42/630 = 1302/630
  5. 1302/630 simplified gives 31/15
  6. So, 84/42 + 6/90 = 31/15
    In mixed form: 21/15

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