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Add 20/24 and 10/21

20/24 + 10/21 is 55/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 24 and 21 is 168

    Next, find the equivalent fraction of both fractional numbers with denominator 168
  2. For the 1st fraction, since 24 × 7 = 168,
    20/24 = 20 × 7/24 × 7 = 140/168
  3. Likewise, for the 2nd fraction, since 21 × 8 = 168,
    10/21 = 10 × 8/21 × 8 = 80/168
  4. Add the two like fractions:
    140/168 + 80/168 = 140 + 80/168 = 220/168
  5. 220/168 simplified gives 55/42
  6. So, 20/24 + 10/21 = 55/42
    In mixed form: 113/42

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