Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Add fractions

Add 30/18 and 8/21

1st number: 1 12/18, 2nd number: 8/21

30/18 + 8/21 is 43/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 21 is 126
  2. For the 1st fraction, since 18 × 7 = 126,
    30/18 = 30 × 7/18 × 7 = 210/126
  3. Likewise, for the 2nd fraction, since 21 × 6 = 126,
    8/21 = 8 × 6/21 × 6 = 48/126
  4. Add the two fractions:
    210/126 + 48/126 = 210 + 48/126 = 258/126
  5. After reducing the fraction, the answer is 43/21
  6. In mixed form: 21/21

MathStep (Works offline)

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

Related:

© everydaycalculation.com