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Subtract 9/20 from 7/63

7/63 - 9/20 is -61/180.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 63 and 20 is 1260

    Next, find the equivalent fraction of both fractional numbers with denominator 1260
  2. For the 1st fraction, since 63 × 20 = 1260,
    7/63 = 7 × 20/63 × 20 = 140/1260
  3. Likewise, for the 2nd fraction, since 20 × 63 = 1260,
    9/20 = 9 × 63/20 × 63 = 567/1260
  4. Subtract the two like fractions:
    140/1260 - 567/1260 = 140 - 567/1260 = -427/1260
  5. After reducing the fraction, the answer is -61/180

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