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Subtract 28/10 from 15/20

1st number: 15/20, 2nd number: 2 8/10

15/20 - 28/10 is -41/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 10 is 20
  2. For the 1st fraction, since 20 × 1 = 20,
    15/20 = 15 × 1/20 × 1 = 15/20
  3. Likewise, for the 2nd fraction, since 10 × 2 = 20,
    28/10 = 28 × 2/10 × 2 = 56/20
  4. Subtract the two fractions:
    15/20 - 56/20 = 15 - 56/20 = -41/20

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