Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 27/20 from 10/42

1st number: 10/42, 2nd number: 1 7/20

10/42 - 27/20 is -467/420.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 20 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 42 × 10 = 420,
    10/42 = 10 × 10/42 × 10 = 100/420
  3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
    27/20 = 27 × 21/20 × 21 = 567/420
  4. Subtract the two like fractions:
    100/420 - 567/420 = 100 - 567/420 = -467/420

MathStep (Works offline)

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

Related:

© everydaycalculation.com