Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 81/12 from 21/2

1st number: 10 1/2, 2nd number: 6 9/12

21/2 - 81/12 is 15/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 12 is 12

    Next, find the equivalent fraction of both fractional numbers with denominator 12
  2. For the 1st fraction, since 2 × 6 = 12,
    21/2 = 21 × 6/2 × 6 = 126/12
  3. Likewise, for the 2nd fraction, since 12 × 1 = 12,
    81/12 = 81 × 1/12 × 1 = 81/12
  4. Subtract the two like fractions:
    126/12 - 81/12 = 126 - 81/12 = 45/12
  5. After reducing the fraction, the answer is 15/4
  6. In mixed form: 33/4

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related:

© everydaycalculation.com