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Add 21/24 and 4/20

21/24 + 4/20 is 43/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 24 and 20 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 24 × 5 = 120,
    21/24 = 21 × 5/24 × 5 = 105/120
  3. Likewise, for the 2nd fraction, since 20 × 6 = 120,
    4/20 = 4 × 6/20 × 6 = 24/120
  4. Add the two like fractions:
    105/120 + 24/120 = 105 + 24/120 = 129/120
  5. 129/120 simplified gives 43/40
  6. So, 21/24 + 4/20 = 43/40
    In mixed form: 13/40

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