Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Add fractions

Add 28/21 and 3/12

1st number: 1 7/21, 2nd number: 3/12

28/21 + 3/12 is 19/12.

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,
    28/21 = 28 × 4/21 × 4 = 112/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    3/12 = 3 × 7/12 × 7 = 21/84
  4. Add the two fractions:
    112/84 + 21/84 = 112 + 21/84 = 133/84
  5. After reducing the fraction, the answer is 19/12
  6. In mixed form: 17/12

MathStep (Works offline)

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

Related:

© everydaycalculation.com