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Subtract 8/20 from 9/30

9/30 - 8/20 is -1/10.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 20 is 60

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 30 × 2 = 60,
    9/30 = 9 × 2/30 × 2 = 18/60
  3. Likewise, for the 2nd fraction, since 20 × 3 = 60,
    8/20 = 8 × 3/20 × 3 = 24/60
  4. Subtract the two like fractions:
    18/60 - 24/60 = 18 - 24/60 = -6/60
  5. After reducing the fraction, the answer is -1/10

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