Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Subtract fractions

Subtract 20/7 from 15/8

1st number: 1 7/8, 2nd number: 2 6/7

15/8 - 20/7 is -55/56.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 7 is 56
  2. For the 1st fraction, since 8 × 7 = 56,
    15/8 = 15 × 7/8 × 7 = 105/56
  3. Likewise, for the 2nd fraction, since 7 × 8 = 56,
    20/7 = 20 × 8/7 × 8 = 160/56
  4. Subtract the two fractions:
    105/56 - 160/56 = 105 - 160/56 = -55/56

MathStep (Works offline)

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

Related:

© everydaycalculation.com