Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 9/5 and 84/21

1st number: 1 4/5, 2nd number: 4 0/21

9/5 + 84/21 is 29/5.

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,
    9/5 = 9 × 21/5 × 21 = 189/105
  3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
    84/21 = 84 × 5/21 × 5 = 420/105
  4. Add the two like fractions:
    189/105 + 420/105 = 189 + 420/105 = 609/105
  5. 609/105 simplified gives 29/5
  6. So, 9/5 + 84/21 = 29/5
    In mixed form: 54/5

MathStep (Works offline)

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

Related:

© everydaycalculation.com