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Add 7/4 and 6/21

1st number: 1 3/4, 2nd number: 6/21

7/4 + 6/21 is 57/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 21 is 84
  2. For the 1st fraction, since 4 × 21 = 84,
    7/4 = 7 × 21/4 × 21 = 147/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    6/21 = 6 × 4/21 × 4 = 24/84
  4. Add the two fractions:
    147/84 + 24/84 = 147 + 24/84 = 171/84
  5. 171/84 simplified gives 57/28
  6. So, 7/4 + 6/21 = 57/28
    In mixed form: 21/28

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