Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 7/21 and 81/4

1st number: 7/21, 2nd number: 20 1/4

7/21 + 81/4 is 247/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 4 is 84
  2. For the 1st fraction, since 21 × 4 = 84,
    7/21 = 7 × 4/21 × 4 = 28/84
  3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
    81/4 = 81 × 21/4 × 21 = 1701/84
  4. Add the two fractions:
    28/84 + 1701/84 = 28 + 1701/84 = 1729/84
  5. 1729/84 simplified gives 247/12
  6. So, 7/21 + 81/4 = 247/12
    In mixed form: 207/12

MathStep (Works offline)

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

Related:

© everydaycalculation.com