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Add 21/4 and 9/7

1st number: 5 1/4, 2nd number: 1 2/7

21/4 + 9/7 is 183/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 7 is 28
  2. For the 1st fraction, since 4 × 7 = 28,
    21/4 = 21 × 7/4 × 7 = 147/28
  3. Likewise, for the 2nd fraction, since 7 × 4 = 28,
    9/7 = 9 × 4/7 × 4 = 36/28
  4. Add the two fractions:
    147/28 + 36/28 = 147 + 36/28 = 183/28
  5. In mixed form: 615/28

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