Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Add fractions

Add 9/21 and 20/12

1st number: 9/21, 2nd number: 1 8/12

9/21 + 20/12 is 44/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 12 is 84
  2. For the 1st fraction, since 21 × 4 = 84,
    9/21 = 9 × 4/21 × 4 = 36/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    20/12 = 20 × 7/12 × 7 = 140/84
  4. Add the two fractions:
    36/84 + 140/84 = 36 + 140/84 = 176/84
  5. After reducing the fraction, the answer is 44/21
  6. In mixed form: 22/21

MathStep (Works offline)

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

Related:

© everydaycalculation.com