Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 5/20 from 42/54

42/54 - 5/20 is 19/36.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 54 and 20 is 540

    Next, find the equivalent fraction of both fractional numbers with denominator 540
  2. For the 1st fraction, since 54 × 10 = 540,
    42/54 = 42 × 10/54 × 10 = 420/540
  3. Likewise, for the 2nd fraction, since 20 × 27 = 540,
    5/20 = 5 × 27/20 × 27 = 135/540
  4. Subtract the two like fractions:
    420/540 - 135/540 = 420 - 135/540 = 285/540
  5. After reducing the fraction, the answer is 19/36

MathStep (Works offline)

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

Related:

© everydaycalculation.com