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Subtract 18/9 from 10/20

1st number: 10/20, 2nd number: 2 0/9

10/20 - 18/9 is -3/2.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 9 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 20 × 9 = 180,
    10/20 = 10 × 9/20 × 9 = 90/180
  3. Likewise, for the 2nd fraction, since 9 × 20 = 180,
    18/9 = 18 × 20/9 × 20 = 360/180
  4. Subtract the two like fractions:
    90/180 - 360/180 = 90 - 360/180 = -270/180
  5. After reducing the fraction, the answer is -3/2

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