Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 40/49 from 21/28

21/28 - 40/49 is -13/196.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 49 is 196
  2. For the 1st fraction, since 28 × 7 = 196,
    21/28 = 21 × 7/28 × 7 = 147/196
  3. Likewise, for the 2nd fraction, since 49 × 4 = 196,
    40/49 = 40 × 4/49 × 4 = 160/196
  4. Subtract the two fractions:
    147/196 - 160/196 = 147 - 160/196 = -13/196

MathStep (Works offline)

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

Related:

© everydaycalculation.com