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Subtract 42/63 from 15/75

15/75 - 42/63 is -7/15.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 75 and 63 is 1575

    Next, find the equivalent fraction of both fractional numbers with denominator 1575
  2. For the 1st fraction, since 75 × 21 = 1575,
    15/75 = 15 × 21/75 × 21 = 315/1575
  3. Likewise, for the 2nd fraction, since 63 × 25 = 1575,
    42/63 = 42 × 25/63 × 25 = 1050/1575
  4. Subtract the two like fractions:
    315/1575 - 1050/1575 = 315 - 1050/1575 = -735/1575
  5. After reducing the fraction, the answer is -7/15

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