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Add 21/8 and 9/7

1st number: 2 5/8, 2nd number: 1 2/7

21/8 + 9/7 is 219/56.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 7 is 56

    Next, find the equivalent fraction of both fractional numbers with denominator 56
  2. For the 1st fraction, since 8 × 7 = 56,
    21/8 = 21 × 7/8 × 7 = 147/56
  3. Likewise, for the 2nd fraction, since 7 × 8 = 56,
    9/7 = 9 × 8/7 × 8 = 72/56
  4. Add the two like fractions:
    147/56 + 72/56 = 147 + 72/56 = 219/56
  5. So, 21/8 + 9/7 = 219/56
    In mixed form: 351/56

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