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Subtract 30/4 from 21/3

1st number: 7 0/3, 2nd number: 7 2/4

21/3 - 30/4 is -1/2.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 3 and 4 is 12

    Next, find the equivalent fraction of both fractional numbers with denominator 12
  2. For the 1st fraction, since 3 × 4 = 12,
    21/3 = 21 × 4/3 × 4 = 84/12
  3. Likewise, for the 2nd fraction, since 4 × 3 = 12,
    30/4 = 30 × 3/4 × 3 = 90/12
  4. Subtract the two like fractions:
    84/12 - 90/12 = 84 - 90/12 = -6/12
  5. After reducing the fraction, the answer is -1/2

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