Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Subtract fractions

Subtract 21/5 from 3/4

1st number: 3/4, 2nd number: 4 1/5

3/4 - 21/5 is -69/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 5 is 20
  2. For the 1st fraction, since 4 × 5 = 20,
    3/4 = 3 × 5/4 × 5 = 15/20
  3. Likewise, for the 2nd fraction, since 5 × 4 = 20,
    21/5 = 21 × 4/5 × 4 = 84/20
  4. Subtract the two fractions:
    15/20 - 84/20 = 15 - 84/20 = -69/20

MathStep (Works offline)

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

Related:

© everydaycalculation.com