Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Add fractions

Add 4/21 and 15/12

1st number: 4/21, 2nd number: 1 3/12

4/21 + 15/12 is 121/84.

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,
    4/21 = 4 × 4/21 × 4 = 16/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    15/12 = 15 × 7/12 × 7 = 105/84
  4. Add the two fractions:
    16/84 + 105/84 = 16 + 105/84 = 121/84
  5. In mixed form: 137/84

MathStep (Works offline)

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

Related:

© everydaycalculation.com