Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 28/8 from 18/7

1st number: 2 4/7, 2nd number: 3 4/8

18/7 - 28/8 is -13/14.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 8 is 56

    Next, find the equivalent fraction of both fractional numbers with denominator 56
  2. For the 1st fraction, since 7 × 8 = 56,
    18/7 = 18 × 8/7 × 8 = 144/56
  3. Likewise, for the 2nd fraction, since 8 × 7 = 56,
    28/8 = 28 × 7/8 × 7 = 196/56
  4. Subtract the two like fractions:
    144/56 - 196/56 = 144 - 196/56 = -52/56
  5. After reducing the fraction, the answer is -13/14

MathStep (Works offline)

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

Related:

© everydaycalculation.com