Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 12/4 from 3/21

1st number: 3/21, 2nd number: 3 0/4

3/21 - 12/4 is -20/7.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 4 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 21 × 4 = 84,
    3/21 = 3 × 4/21 × 4 = 12/84
  3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
    12/4 = 12 × 21/4 × 21 = 252/84
  4. Subtract the two like fractions:
    12/84 - 252/84 = 12 - 252/84 = -240/84
  5. After reducing the fraction, the answer is -20/7

MathStep (Works offline)

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

Related:

© everydaycalculation.com