Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 9/21 from 5/4

1st number: 1 1/4, 2nd number: 9/21

5/4 - 9/21 is 23/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 21 is 84
  2. For the 1st fraction, since 4 × 21 = 84,
    5/4 = 5 × 21/4 × 21 = 105/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    9/21 = 9 × 4/21 × 4 = 36/84
  4. Subtract the two fractions:
    105/84 - 36/84 = 105 - 36/84 = 69/84
  5. After reducing the fraction, the answer is 23/28

MathStep (Works offline)

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

Related:

© everydaycalculation.com