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Subtract 90/80 from 30/60

1st number: 30/60, 2nd number: 1 10/80

30/60 - 90/80 is -5/8.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 60 and 80 is 240

    Next, find the equivalent fraction of both fractional numbers with denominator 240
  2. For the 1st fraction, since 60 × 4 = 240,
    30/60 = 30 × 4/60 × 4 = 120/240
  3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
    90/80 = 90 × 3/80 × 3 = 270/240
  4. Subtract the two like fractions:
    120/240 - 270/240 = 120 - 270/240 = -150/240
  5. After reducing the fraction, the answer is -5/8

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