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Subtract 3/72 from 7/20

7/20 - 3/72 is 37/120.

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,
    7/20 = 7 × 18/20 × 18 = 126/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    3/72 = 3 × 5/72 × 5 = 15/360
  4. Subtract the two like fractions:
    126/360 - 15/360 = 126 - 15/360 = 111/360
  5. After reducing the fraction, the answer is 37/120

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