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Subtract 90/40 from 5/18

1st number: 5/18, 2nd number: 2 10/40

5/18 - 90/40 is -71/36.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 40 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 18 × 20 = 360,
    5/18 = 5 × 20/18 × 20 = 100/360
  3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
    90/40 = 90 × 9/40 × 9 = 810/360
  4. Subtract the two like fractions:
    100/360 - 810/360 = 100 - 810/360 = -710/360
  5. After reducing the fraction, the answer is -71/36

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