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Subtract 12/5 from 18/4

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

18/4 - 12/5 is 21/10.

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,
    18/4 = 18 × 5/4 × 5 = 90/20
  3. Likewise, for the 2nd fraction, since 5 × 4 = 20,
    12/5 = 12 × 4/5 × 4 = 48/20
  4. Subtract the two like fractions:
    90/20 - 48/20 = 90 - 48/20 = 42/20
  5. After reducing the fraction, the answer is 21/10
  6. In mixed form: 21/10

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