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Subtract 18/72 from 20/5

1st number: 4 0/5, 2nd number: 18/72

20/5 - 18/72 is 15/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 72 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 5 × 72 = 360,
    20/5 = 20 × 72/5 × 72 = 1440/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    18/72 = 18 × 5/72 × 5 = 90/360
  4. Subtract the two like fractions:
    1440/360 - 90/360 = 1440 - 90/360 = 1350/360
  5. After reducing the fraction, the answer is 15/4
  6. In mixed form: 33/4

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