Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 20/80 and 12/9

1st number: 20/80, 2nd number: 1 3/9

20/80 + 12/9 is 19/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 9 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 80 × 9 = 720,
    20/80 = 20 × 9/80 × 9 = 180/720
  3. Likewise, for the 2nd fraction, since 9 × 80 = 720,
    12/9 = 12 × 80/9 × 80 = 960/720
  4. Add the two like fractions:
    180/720 + 960/720 = 180 + 960/720 = 1140/720
  5. 1140/720 simplified gives 19/12
  6. So, 20/80 + 12/9 = 19/12
    In mixed form: 17/12

MathStep (Works offline)

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

Related:

© everydaycalculation.com