Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 27/15 and 21/28

1st number: 1 12/15, 2nd number: 21/28

27/15 + 21/28 is 51/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 28 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 15 × 28 = 420,
    27/15 = 27 × 28/15 × 28 = 756/420
  3. Likewise, for the 2nd fraction, since 28 × 15 = 420,
    21/28 = 21 × 15/28 × 15 = 315/420
  4. Add the two like fractions:
    756/420 + 315/420 = 756 + 315/420 = 1071/420
  5. 1071/420 simplified gives 51/20
  6. So, 27/15 + 21/28 = 51/20
    In mixed form: 211/20

MathStep (Works offline)

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

Related:

© everydaycalculation.com