Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 20/42 and 4/21

20/42 + 4/21 is 2/3.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 21 is 42

    Next, find the equivalent fraction of both fractional numbers with denominator 42
  2. For the 1st fraction, since 42 × 1 = 42,
    20/42 = 20 × 1/42 × 1 = 20/42
  3. Likewise, for the 2nd fraction, since 21 × 2 = 42,
    4/21 = 4 × 2/21 × 2 = 8/42
  4. Add the two like fractions:
    20/42 + 8/42 = 20 + 8/42 = 28/42
  5. 28/42 simplified gives 2/3
  6. So, 20/42 + 4/21 = 2/3

MathStep (Works offline)

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

Related:

© everydaycalculation.com