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Add 21/24 and 21/42

21/24 + 21/42 is 11/8.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 24 and 42 is 168

    Next, find the equivalent fraction of both fractional numbers with denominator 168
  2. For the 1st fraction, since 24 × 7 = 168,
    21/24 = 21 × 7/24 × 7 = 147/168
  3. Likewise, for the 2nd fraction, since 42 × 4 = 168,
    21/42 = 21 × 4/42 × 4 = 84/168
  4. Add the two like fractions:
    147/168 + 84/168 = 147 + 84/168 = 231/168
  5. 231/168 simplified gives 11/8
  6. So, 21/24 + 21/42 = 11/8
    In mixed form: 13/8

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