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Subtract 90/20 from 1/63

1st number: 1/63, 2nd number: 4 10/20

1/63 - 90/20 is -565/126.

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,
    1/63 = 1 × 20/63 × 20 = 20/1260
  3. Likewise, for the 2nd fraction, since 20 × 63 = 1260,
    90/20 = 90 × 63/20 × 63 = 5670/1260
  4. Subtract the two like fractions:
    20/1260 - 5670/1260 = 20 - 5670/1260 = -5650/1260
  5. After reducing the fraction, the answer is -565/126

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