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Subtract 3/20 from 10/45

10/45 - 3/20 is 13/180.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 20 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 45 × 4 = 180,
    10/45 = 10 × 4/45 × 4 = 40/180
  3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
    3/20 = 3 × 9/20 × 9 = 27/180
  4. Subtract the two like fractions:
    40/180 - 27/180 = 40 - 27/180 = 13/180

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