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Subtract 45/10 from 21/12

1st number: 1 9/12, 2nd number: 4 5/10

21/12 - 45/10 is -11/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 10 is 60
  2. For the 1st fraction, since 12 × 5 = 60,
    21/12 = 21 × 5/12 × 5 = 105/60
  3. Likewise, for the 2nd fraction, since 10 × 6 = 60,
    45/10 = 45 × 6/10 × 6 = 270/60
  4. Subtract the two fractions:
    105/60 - 270/60 = 105 - 270/60 = -165/60
  5. After reducing the fraction, the answer is -11/4

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