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Subtract 1/18 from 1/45

1/45 - 1/18 is -1/30.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 18 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 45 × 2 = 90,
    1/45 = 1 × 2/45 × 2 = 2/90
  3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
    1/18 = 1 × 5/18 × 5 = 5/90
  4. Subtract the two like fractions:
    2/90 - 5/90 = 2 - 5/90 = -3/90
  5. After reducing the fraction, the answer is -1/30

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