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Subtract 16/90 from 1/63

1/63 - 16/90 is -17/105.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 63 and 90 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 63 × 10 = 630,
    1/63 = 1 × 10/63 × 10 = 10/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    16/90 = 16 × 7/90 × 7 = 112/630
  4. Subtract the two like fractions:
    10/630 - 112/630 = 10 - 112/630 = -102/630
  5. After reducing the fraction, the answer is -17/105

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