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Add 9/21 and 7/8

9/21 + 7/8 is 73/56.

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,
    7/8 = 7 × 21/8 × 21 = 147/168
  4. Add the two like fractions:
    72/168 + 147/168 = 72 + 147/168 = 219/168
  5. 219/168 simplified gives 73/56
  6. So, 9/21 + 7/8 = 73/56
    In mixed form: 117/56

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