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Subtract 18/8 from 20/80

1st number: 20/80, 2nd number: 2 2/8

20/80 - 18/8 is -2/1.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 8 is 80

    Next, find the equivalent fraction of both fractional numbers with denominator 80
  2. For the 1st fraction, since 80 × 1 = 80,
    20/80 = 20 × 1/80 × 1 = 20/80
  3. Likewise, for the 2nd fraction, since 8 × 10 = 80,
    18/8 = 18 × 10/8 × 10 = 180/80
  4. Subtract the two like fractions:
    20/80 - 180/80 = 20 - 180/80 = -160/80
  5. After reducing the fraction, the answer is -2/1

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