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Subtract 18/80 from 1/2

1/2 - 18/80 is 11/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 80 is 80

    Next, find the equivalent fraction of both fractional numbers with denominator 80
  2. For the 1st fraction, since 2 × 40 = 80,
    1/2 = 1 × 40/2 × 40 = 40/80
  3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
    18/80 = 18 × 1/80 × 1 = 18/80
  4. Subtract the two like fractions:
    40/80 - 18/80 = 40 - 18/80 = 22/80
  5. After reducing the fraction, the answer is 11/40

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