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Subtract 20/5 from 25/18

1st number: 1 7/18, 2nd number: 4 0/5

25/18 - 20/5 is -47/18.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 5 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 18 × 5 = 90,
    25/18 = 25 × 5/18 × 5 = 125/90
  3. Likewise, for the 2nd fraction, since 5 × 18 = 90,
    20/5 = 20 × 18/5 × 18 = 360/90
  4. Subtract the two like fractions:
    125/90 - 360/90 = 125 - 360/90 = -235/90
  5. After reducing the fraction, the answer is -47/18

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