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Subtract 15/90 from 20/9

1st number: 2 2/9, 2nd number: 15/90

20/9 - 15/90 is 37/18.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 90 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 9 × 10 = 90,
    20/9 = 20 × 10/9 × 10 = 200/90
  3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
    15/90 = 15 × 1/90 × 1 = 15/90
  4. Subtract the two like fractions:
    200/90 - 15/90 = 200 - 15/90 = 185/90
  5. After reducing the fraction, the answer is 37/18
  6. In mixed form: 21/18

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