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Add 21/30 and 18/24

21/30 + 18/24 is 29/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 24 is 120
  2. For the 1st fraction, since 30 × 4 = 120,
    21/30 = 21 × 4/30 × 4 = 84/120
  3. Likewise, for the 2nd fraction, since 24 × 5 = 120,
    18/24 = 18 × 5/24 × 5 = 90/120
  4. Add the two fractions:
    84/120 + 90/120 = 84 + 90/120 = 174/120
  5. 174/120 simplified gives 29/20
  6. So, 21/30 + 18/24 = 29/20
    In mixed form: 19/20

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