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Subtract 28/7 from 21/4

1st number: 5 1/4, 2nd number: 4 0/7

21/4 - 28/7 is 5/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 7 is 28

    Next, find the equivalent fraction of both fractional numbers with denominator 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,
    28/7 = 28 × 4/7 × 4 = 112/28
  4. Subtract the two like fractions:
    147/28 - 112/28 = 147 - 112/28 = 35/28
  5. After reducing the fraction, the answer is 5/4
  6. In mixed form: 11/4

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