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Add 21/18 and 90/24

1st number: 1 3/18, 2nd number: 3 18/24

21/18 + 90/24 is 59/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 24 is 72

    Next, find the equivalent fraction of both fractional numbers with denominator 72
  2. For the 1st fraction, since 18 × 4 = 72,
    21/18 = 21 × 4/18 × 4 = 84/72
  3. Likewise, for the 2nd fraction, since 24 × 3 = 72,
    90/24 = 90 × 3/24 × 3 = 270/72
  4. Add the two like fractions:
    84/72 + 270/72 = 84 + 270/72 = 354/72
  5. 354/72 simplified gives 59/12
  6. So, 21/18 + 90/24 = 59/12
    In mixed form: 411/12

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