Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 18/15 and 35/21

1st number: 1 3/15, 2nd number: 1 14/21

18/15 + 35/21 is 43/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 21 is 105

    Next, find the equivalent fraction of both fractional numbers with denominator 105
  2. For the 1st fraction, since 15 × 7 = 105,
    18/15 = 18 × 7/15 × 7 = 126/105
  3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
    35/21 = 35 × 5/21 × 5 = 175/105
  4. Add the two like fractions:
    126/105 + 175/105 = 126 + 175/105 = 301/105
  5. 301/105 simplified gives 43/15
  6. So, 18/15 + 35/21 = 43/15
    In mixed form: 213/15

MathStep (Works offline)

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

Related:

© everydaycalculation.com