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Subtract 21/5 from 14/4

1st number: 3 2/4, 2nd number: 4 1/5

14/4 - 21/5 is -7/10.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 5 is 20

    Next, find the equivalent fraction of both fractional numbers with denominator 20
  2. For the 1st fraction, since 4 × 5 = 20,
    14/4 = 14 × 5/4 × 5 = 70/20
  3. Likewise, for the 2nd fraction, since 5 × 4 = 20,
    21/5 = 21 × 4/5 × 4 = 84/20
  4. Subtract the two like fractions:
    70/20 - 84/20 = 70 - 84/20 = -14/20
  5. After reducing the fraction, the answer is -7/10

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