Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 4/7 and 21/8

1st number: 4/7, 2nd number: 2 5/8

4/7 + 21/8 is 179/56.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 8 is 56

    Next, find the equivalent fraction of both fractional numbers with denominator 56
  2. For the 1st fraction, since 7 × 8 = 56,
    4/7 = 4 × 8/7 × 8 = 32/56
  3. Likewise, for the 2nd fraction, since 8 × 7 = 56,
    21/8 = 21 × 7/8 × 7 = 147/56
  4. Add the two like fractions:
    32/56 + 147/56 = 32 + 147/56 = 179/56
  5. So, 4/7 + 21/8 = 179/56
    In mixed form: 311/56

MathStep (Works offline)

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

Related:

© everydaycalculation.com