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Subtract 9/10 from 9/18

9/18 - 9/10 is -2/5.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 10 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 18 × 5 = 90,
    9/18 = 9 × 5/18 × 5 = 45/90
  3. Likewise, for the 2nd fraction, since 10 × 9 = 90,
    9/10 = 9 × 9/10 × 9 = 81/90
  4. Subtract the two like fractions:
    45/90 - 81/90 = 45 - 81/90 = -36/90
  5. After reducing the fraction, the answer is -2/5

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