Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 12/18 and 81/84

12/18 + 81/84 is 137/84.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 84 is 252

    Next, find the equivalent fraction of both fractional numbers with denominator 252
  2. For the 1st fraction, since 18 × 14 = 252,
    12/18 = 12 × 14/18 × 14 = 168/252
  3. Likewise, for the 2nd fraction, since 84 × 3 = 252,
    81/84 = 81 × 3/84 × 3 = 243/252
  4. Add the two like fractions:
    168/252 + 243/252 = 168 + 243/252 = 411/252
  5. 411/252 simplified gives 137/84
  6. So, 12/18 + 81/84 = 137/84
    In mixed form: 153/84

MathStep (Works offline)

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

Related:

© everydaycalculation.com