Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Add fractions

Add 30/54 and 40/21

1st number: 30/54, 2nd number: 1 19/21

30/54 + 40/21 is 155/63.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 54 and 21 is 378
  2. For the 1st fraction, since 54 × 7 = 378,
    30/54 = 30 × 7/54 × 7 = 210/378
  3. Likewise, for the 2nd fraction, since 21 × 18 = 378,
    40/21 = 40 × 18/21 × 18 = 720/378
  4. Add the two fractions:
    210/378 + 720/378 = 210 + 720/378 = 930/378
  5. After reducing the fraction, the answer is 155/63
  6. In mixed form: 229/63

MathStep (Works offline)

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

Related:

© everydaycalculation.com