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Subtract 1/10 from 7/90

7/90 - 1/10 is -1/45.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 90 × 1 = 90,
    7/90 = 7 × 1/90 × 1 = 7/90
  3. Likewise, for the 2nd fraction, since 10 × 9 = 90,
    1/10 = 1 × 9/10 × 9 = 9/90
  4. Subtract the two like fractions:
    7/90 - 9/90 = 7 - 9/90 = -2/90
  5. After reducing the fraction, the answer is -1/45

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