Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 21/6 from 8/42

1st number: 8/42, 2nd number: 3 3/6

8/42 - 21/6 is -139/42.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 6 is 42
  2. For the 1st fraction, since 42 × 1 = 42,
    8/42 = 8 × 1/42 × 1 = 8/42
  3. Likewise, for the 2nd fraction, since 6 × 7 = 42,
    21/6 = 21 × 7/6 × 7 = 147/42
  4. Subtract the two fractions:
    8/42 - 147/42 = 8 - 147/42 = -139/42

MathStep (Works offline)

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

Related:

© everydaycalculation.com