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Subtract 3/18 from 8/20

8/20 - 3/18 is 7/30.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 18 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 20 × 9 = 180,
    8/20 = 8 × 9/20 × 9 = 72/180
  3. Likewise, for the 2nd fraction, since 18 × 10 = 180,
    3/18 = 3 × 10/18 × 10 = 30/180
  4. Subtract the two like fractions:
    72/180 - 30/180 = 72 - 30/180 = 42/180
  5. After reducing the fraction, the answer is 7/30

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