Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 80/5 and 7/21

1st number: 16 0/5, 2nd number: 7/21

80/5 + 7/21 is 49/3.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 21 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 5 × 21 = 105,
    80/5 = 80 × 21/5 × 21 = 1680/105
  3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
    7/21 = 7 × 5/21 × 5 = 35/105
  4. Add the two like fractions:
    1680/105 + 35/105 = 1680 + 35/105 = 1715/105
  5. 1715/105 simplified gives 49/3
  6. So, 80/5 + 7/21 = 49/3
    In mixed form: 161/3

MathStep (Works offline)

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

Related:

© everydaycalculation.com