Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 98/18 from 18/21

1st number: 18/21, 2nd number: 5 8/18

18/21 - 98/18 is -289/63.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 18 is 126

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 21 × 6 = 126,
    18/21 = 18 × 6/21 × 6 = 108/126
  3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
    98/18 = 98 × 7/18 × 7 = 686/126
  4. Subtract the two like fractions:
    108/126 - 686/126 = 108 - 686/126 = -578/126
  5. After reducing the fraction, the answer is -289/63

MathStep (Works offline)

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

Related:

© everydaycalculation.com