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Subtract 20/10 from 15/30

1st number: 15/30, 2nd number: 2 0/10

15/30 - 20/10 is -3/2.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 10 is 30
  2. For the 1st fraction, since 30 × 1 = 30,
    15/30 = 15 × 1/30 × 1 = 15/30
  3. Likewise, for the 2nd fraction, since 10 × 3 = 30,
    20/10 = 20 × 3/10 × 3 = 60/30
  4. Subtract the two fractions:
    15/30 - 60/30 = 15 - 60/30 = -45/30
  5. After reducing the fraction, the answer is -3/2

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