Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 21/54 and 5/7

21/54 + 5/7 is 139/126.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 54 and 7 is 378

    Next, find the equivalent fraction of both fractional numbers with denominator 378
  2. For the 1st fraction, since 54 × 7 = 378,
    21/54 = 21 × 7/54 × 7 = 147/378
  3. Likewise, for the 2nd fraction, since 7 × 54 = 378,
    5/7 = 5 × 54/7 × 54 = 270/378
  4. Add the two like fractions:
    147/378 + 270/378 = 147 + 270/378 = 417/378
  5. 417/378 simplified gives 139/126
  6. So, 21/54 + 5/7 = 139/126
    In mixed form: 113/126

MathStep (Works offline)

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

Related:

© everydaycalculation.com