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Add 9/21 and 4/8

9/21 + 4/8 is 13/14.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 8 is 168

    Next, find the equivalent fraction of both fractional numbers with denominator 168
  2. For the 1st fraction, since 21 × 8 = 168,
    9/21 = 9 × 8/21 × 8 = 72/168
  3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
    4/8 = 4 × 21/8 × 21 = 84/168
  4. Add the two like fractions:
    72/168 + 84/168 = 72 + 84/168 = 156/168
  5. 156/168 simplified gives 13/14
  6. So, 9/21 + 4/8 = 13/14

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