Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 18/21 from 5/2

1st number: 2 1/2, 2nd number: 18/21

5/2 - 18/21 is 23/14.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 21 is 42
  2. For the 1st fraction, since 2 × 21 = 42,
    5/2 = 5 × 21/2 × 21 = 105/42
  3. Likewise, for the 2nd fraction, since 21 × 2 = 42,
    18/21 = 18 × 2/21 × 2 = 36/42
  4. Subtract the two fractions:
    105/42 - 36/42 = 105 - 36/42 = 69/42
  5. After reducing the fraction, the answer is 23/14
  6. In mixed form: 19/14

MathStep (Works offline)

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

Related:

© everydaycalculation.com