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Subtract 9/18 from 20/5

1st number: 4 0/5, 2nd number: 9/18

20/5 - 9/18 is 7/2.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 18 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 5 × 18 = 90,
    20/5 = 20 × 18/5 × 18 = 360/90
  3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
    9/18 = 9 × 5/18 × 5 = 45/90
  4. Subtract the two like fractions:
    360/90 - 45/90 = 360 - 45/90 = 315/90
  5. After reducing the fraction, the answer is 7/2
  6. In mixed form: 31/2

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