Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 28/49 from 7/20

7/20 - 28/49 is -31/140.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 49 is 980

    Next, find the equivalent fraction of both fractional numbers with denominator 980
  2. For the 1st fraction, since 20 × 49 = 980,
    7/20 = 7 × 49/20 × 49 = 343/980
  3. Likewise, for the 2nd fraction, since 49 × 20 = 980,
    28/49 = 28 × 20/49 × 20 = 560/980
  4. Subtract the two like fractions:
    343/980 - 560/980 = 343 - 560/980 = -217/980
  5. After reducing the fraction, the answer is -31/140

MathStep (Works offline)

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

Related:

© everydaycalculation.com