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Subtract 7/90 from 4/5

4/5 - 7/90 is 13/18.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 5 × 18 = 90,
    4/5 = 4 × 18/5 × 18 = 72/90
  3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
    7/90 = 7 × 1/90 × 1 = 7/90
  4. Subtract the two like fractions:
    72/90 - 7/90 = 72 - 7/90 = 65/90
  5. After reducing the fraction, the answer is 13/18

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