Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 12/54 and 15/21

12/54 + 15/21 is 59/63.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 54 and 21 is 378

    Next, find the equivalent fraction of both fractional numbers with denominator 378
  2. For the 1st fraction, since 54 × 7 = 378,
    12/54 = 12 × 7/54 × 7 = 84/378
  3. Likewise, for the 2nd fraction, since 21 × 18 = 378,
    15/21 = 15 × 18/21 × 18 = 270/378
  4. Add the two like fractions:
    84/378 + 270/378 = 84 + 270/378 = 354/378
  5. 354/378 simplified gives 59/63
  6. So, 12/54 + 15/21 = 59/63

MathStep (Works offline)

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

Related:

© everydaycalculation.com