Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 21/42 and 7/56

21/42 + 7/56 is 5/8.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 56 is 168

    Next, find the equivalent fraction of both fractional numbers with denominator 168
  2. For the 1st fraction, since 42 × 4 = 168,
    21/42 = 21 × 4/42 × 4 = 84/168
  3. Likewise, for the 2nd fraction, since 56 × 3 = 168,
    7/56 = 7 × 3/56 × 3 = 21/168
  4. Add the two like fractions:
    84/168 + 21/168 = 84 + 21/168 = 105/168
  5. 105/168 simplified gives 5/8
  6. So, 21/42 + 7/56 = 5/8

MathStep (Works offline)

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

Related:

© everydaycalculation.com