Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 15/21 and 5/49

15/21 + 5/49 is 40/49.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 49 is 147

    Next, find the equivalent fraction of both fractional numbers with denominator 147
  2. For the 1st fraction, since 21 × 7 = 147,
    15/21 = 15 × 7/21 × 7 = 105/147
  3. Likewise, for the 2nd fraction, since 49 × 3 = 147,
    5/49 = 5 × 3/49 × 3 = 15/147
  4. Add the two like fractions:
    105/147 + 15/147 = 105 + 15/147 = 120/147
  5. 120/147 simplified gives 40/49
  6. So, 15/21 + 5/49 = 40/49

MathStep (Works offline)

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

Related:

© everydaycalculation.com