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Subtract 15/20 from 45/4

1st number: 11 1/4, 2nd number: 15/20

45/4 - 15/20 is 21/2.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 20
  2. For the 1st fraction, since 4 × 5 = 20,
    45/4 = 45 × 5/4 × 5 = 225/20
  3. Likewise, for the 2nd fraction, since 20 × 1 = 20,
    15/20 = 15 × 1/20 × 1 = 15/20
  4. Subtract the two like fractions:
    225/20 - 15/20 = 225 - 15/20 = 210/20
  5. After reducing the fraction, the answer is 21/2
  6. In mixed form: 101/2

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