Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 9/18 from 20/42

20/42 - 9/18 is -1/42.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 18 is 126

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 42 × 3 = 126,
    20/42 = 20 × 3/42 × 3 = 60/126
  3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
    9/18 = 9 × 7/18 × 7 = 63/126
  4. Subtract the two like fractions:
    60/126 - 63/126 = 60 - 63/126 = -3/126
  5. After reducing the fraction, the answer is -1/42

MathStep (Works offline)

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

Related:

© everydaycalculation.com