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Subtract 3/18 from 12/45

12/45 - 3/18 is 1/10.

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,
    12/45 = 12 × 2/45 × 2 = 24/90
  3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
    3/18 = 3 × 5/18 × 5 = 15/90
  4. Subtract the two like fractions:
    24/90 - 15/90 = 24 - 15/90 = 9/90
  5. After reducing the fraction, the answer is 1/10

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