Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 12/20 and 4/21

12/20 + 4/21 is 83/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 21 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 20 × 21 = 420,
    12/20 = 12 × 21/20 × 21 = 252/420
  3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
    4/21 = 4 × 20/21 × 20 = 80/420
  4. Add the two like fractions:
    252/420 + 80/420 = 252 + 80/420 = 332/420
  5. 332/420 simplified gives 83/105
  6. So, 12/20 + 4/21 = 83/105

MathStep (Works offline)

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

Related:

© everydaycalculation.com