Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 20/81 and 12/80

20/81 + 12/80 is 643/1620.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 81 and 80 is 6480

    Next, find the equivalent fraction of both fractional numbers with denominator 6480
  2. For the 1st fraction, since 81 × 80 = 6480,
    20/81 = 20 × 80/81 × 80 = 1600/6480
  3. Likewise, for the 2nd fraction, since 80 × 81 = 6480,
    12/80 = 12 × 81/80 × 81 = 972/6480
  4. Add the two like fractions:
    1600/6480 + 972/6480 = 1600 + 972/6480 = 2572/6480
  5. 2572/6480 simplified gives 643/1620
  6. So, 20/81 + 12/80 = 643/1620

MathStep (Works offline)

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

Related:

© everydaycalculation.com