Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 15/8 from 5/18

1st number: 5/18, 2nd number: 1 7/8

5/18 - 15/8 is -115/72.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 8 is 72

    Next, find the equivalent fraction of both fractional numbers with denominator 72
  2. For the 1st fraction, since 18 × 4 = 72,
    5/18 = 5 × 4/18 × 4 = 20/72
  3. Likewise, for the 2nd fraction, since 8 × 9 = 72,
    15/8 = 15 × 9/8 × 9 = 135/72
  4. Subtract the two like fractions:
    20/72 - 135/72 = 20 - 135/72 = -115/72

MathStep (Works offline)

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

Related:

© everydaycalculation.com