Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 30/3 and 42/21

1st number: 10 0/3, 2nd number: 2 0/21

30/3 + 42/21 is 12/1.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 3 and 21 is 21

    Next, find the equivalent fraction of both fractional numbers with denominator 21
  2. For the 1st fraction, since 3 × 7 = 21,
    30/3 = 30 × 7/3 × 7 = 210/21
  3. Likewise, for the 2nd fraction, since 21 × 1 = 21,
    42/21 = 42 × 1/21 × 1 = 42/21
  4. Add the two like fractions:
    210/21 + 42/21 = 210 + 42/21 = 252/21
  5. 252/21 simplified gives 12/1
  6. So, 30/3 + 42/21 = 12/1

MathStep (Works offline)

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

Related:

© everydaycalculation.com