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Subtract 20/40 from 28/18

1st number: 1 10/18, 2nd number: 20/40

28/18 - 20/40 is 19/18.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 40 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 18 × 20 = 360,
    28/18 = 28 × 20/18 × 20 = 560/360
  3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
    20/40 = 20 × 9/40 × 9 = 180/360
  4. Subtract the two like fractions:
    560/360 - 180/360 = 560 - 180/360 = 380/360
  5. After reducing the fraction, the answer is 19/18
  6. In mixed form: 11/18

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