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Subtract 20/18 from 5/45

1st number: 5/45, 2nd number: 1 2/18

5/45 - 20/18 is -1/1.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 18 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 45 × 2 = 90,
    5/45 = 5 × 2/45 × 2 = 10/90
  3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
    20/18 = 20 × 5/18 × 5 = 100/90
  4. Subtract the two like fractions:
    10/90 - 100/90 = 10 - 100/90 = -90/90
  5. After reducing the fraction, the answer is -1/1

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