Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Subtract fractions

Subtract 20/42 from 42/15

1st number: 2 12/15, 2nd number: 20/42

42/15 - 20/42 is 244/105.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 42 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 15 × 14 = 210,
    42/15 = 42 × 14/15 × 14 = 588/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    20/42 = 20 × 5/42 × 5 = 100/210
  4. Subtract the two like fractions:
    588/210 - 100/210 = 588 - 100/210 = 488/210
  5. After reducing the fraction, the answer is 244/105
  6. In mixed form: 234/105

MathStep (Works offline)

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

Related:

© everydaycalculation.com