Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 21/30 and 3/12

21/30 + 3/12 is 19/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 12 is 60

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 30 × 2 = 60,
    21/30 = 21 × 2/30 × 2 = 42/60
  3. Likewise, for the 2nd fraction, since 12 × 5 = 60,
    3/12 = 3 × 5/12 × 5 = 15/60
  4. Add the two like fractions:
    42/60 + 15/60 = 42 + 15/60 = 57/60
  5. 57/60 simplified gives 19/20
  6. So, 21/30 + 3/12 = 19/20

MathStep (Works offline)

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

Related:

© everydaycalculation.com