Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 27/7 from 21/12

1st number: 1 9/12, 2nd number: 3 6/7

21/12 - 27/7 is -59/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 7 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 12 × 7 = 84,
    21/12 = 21 × 7/12 × 7 = 147/84
  3. Likewise, for the 2nd fraction, since 7 × 12 = 84,
    27/7 = 27 × 12/7 × 12 = 324/84
  4. Subtract the two like fractions:
    147/84 - 324/84 = 147 - 324/84 = -177/84
  5. After reducing the fraction, the answer is -59/28

MathStep (Works offline)

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

Related:

© everydaycalculation.com