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Subtract 21/10 from 3/2

1st number: 1 1/2, 2nd number: 2 1/10

3/2 - 21/10 is -3/5.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 10 is 10
  2. For the 1st fraction, since 2 × 5 = 10,
    3/2 = 3 × 5/2 × 5 = 15/10
  3. Likewise, for the 2nd fraction, since 10 × 1 = 10,
    21/10 = 21 × 1/10 × 1 = 21/10
  4. Subtract the two fractions:
    15/10 - 21/10 = 15 - 21/10 = -6/10
  5. After reducing the fraction, the answer is -3/5

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