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Subtract 90/63 from 3/72

1st number: 3/72, 2nd number: 1 27/63

3/72 - 90/63 is -233/168.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 63 is 504

    Next, find the equivalent fraction of both fractional numbers with denominator 504
  2. For the 1st fraction, since 72 × 7 = 504,
    3/72 = 3 × 7/72 × 7 = 21/504
  3. Likewise, for the 2nd fraction, since 63 × 8 = 504,
    90/63 = 90 × 8/63 × 8 = 720/504
  4. Subtract the two like fractions:
    21/504 - 720/504 = 21 - 720/504 = -699/504
  5. After reducing the fraction, the answer is -233/168

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