Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 7/21 and 4/9

7/21 + 4/9 is 7/9.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 9 is 63
  2. For the 1st fraction, since 21 × 3 = 63,
    7/21 = 7 × 3/21 × 3 = 21/63
  3. Likewise, for the 2nd fraction, since 9 × 7 = 63,
    4/9 = 4 × 7/9 × 7 = 28/63
  4. Add the two fractions:
    21/63 + 28/63 = 21 + 28/63 = 49/63
  5. 49/63 simplified gives 7/9
  6. So, 7/21 + 4/9 = 7/9

MathStep (Works offline)

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

Related:

© everydaycalculation.com