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Subtract 3/72 from 1/20

1/20 - 3/72 is 1/120.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 72 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 20 × 18 = 360,
    1/20 = 1 × 18/20 × 18 = 18/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    3/72 = 3 × 5/72 × 5 = 15/360
  4. Subtract the two like fractions:
    18/360 - 15/360 = 18 - 15/360 = 3/360
  5. After reducing the fraction, the answer is 1/120

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