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Subtract 15/63 from 20/15

1st number: 1 5/15, 2nd number: 15/63

20/15 - 15/63 is 23/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 63 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 15 × 21 = 315,
    20/15 = 20 × 21/15 × 21 = 420/315
  3. Likewise, for the 2nd fraction, since 63 × 5 = 315,
    15/63 = 15 × 5/63 × 5 = 75/315
  4. Subtract the two like fractions:
    420/315 - 75/315 = 420 - 75/315 = 345/315
  5. After reducing the fraction, the answer is 23/21
  6. In mixed form: 12/21

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