Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 21/56 and 27/20

1st number: 21/56, 2nd number: 1 7/20

21/56 + 27/20 is 69/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 56 and 20 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 56 × 5 = 280,
    21/56 = 21 × 5/56 × 5 = 105/280
  3. Likewise, for the 2nd fraction, since 20 × 14 = 280,
    27/20 = 27 × 14/20 × 14 = 378/280
  4. Add the two like fractions:
    105/280 + 378/280 = 105 + 378/280 = 483/280
  5. 483/280 simplified gives 69/40
  6. So, 21/56 + 27/20 = 69/40
    In mixed form: 129/40

MathStep (Works offline)

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

Related:

© everydaycalculation.com