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Add 9/56 and 15/21

9/56 + 15/21 is 7/8.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 56 and 21 is 168

    Next, find the equivalent fraction of both fractional numbers with denominator 168
  2. For the 1st fraction, since 56 × 3 = 168,
    9/56 = 9 × 3/56 × 3 = 27/168
  3. Likewise, for the 2nd fraction, since 21 × 8 = 168,
    15/21 = 15 × 8/21 × 8 = 120/168
  4. Add the two like fractions:
    27/168 + 120/168 = 27 + 120/168 = 147/168
  5. 147/168 simplified gives 7/8
  6. So, 9/56 + 15/21 = 7/8

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