Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 8/20 from 1/7

1/7 - 8/20 is -9/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 20 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 7 × 20 = 140,
    1/7 = 1 × 20/7 × 20 = 20/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    8/20 = 8 × 7/20 × 7 = 56/140
  4. Subtract the two like fractions:
    20/140 - 56/140 = 20 - 56/140 = -36/140
  5. After reducing the fraction, the answer is -9/35

MathStep (Works offline)

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

Related:

© everydaycalculation.com