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Add 20/21 and 4/24

20/21 + 4/24 is 47/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 24 is 168
  2. For the 1st fraction, since 21 × 8 = 168,
    20/21 = 20 × 8/21 × 8 = 160/168
  3. Likewise, for the 2nd fraction, since 24 × 7 = 168,
    4/24 = 4 × 7/24 × 7 = 28/168
  4. Add the two fractions:
    160/168 + 28/168 = 160 + 28/168 = 188/168
  5. 188/168 simplified gives 47/42
  6. So, 20/21 + 4/24 = 47/42
    In mixed form: 15/42

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