Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 21/3 and 12/45

1st number: 7 0/3, 2nd number: 12/45

21/3 + 12/45 is 109/15.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 3 and 45 is 45

    Next, find the equivalent fraction of both fractional numbers with denominator 45
  2. For the 1st fraction, since 3 × 15 = 45,
    21/3 = 21 × 15/3 × 15 = 315/45
  3. Likewise, for the 2nd fraction, since 45 × 1 = 45,
    12/45 = 12 × 1/45 × 1 = 12/45
  4. Add the two like fractions:
    315/45 + 12/45 = 315 + 12/45 = 327/45
  5. 327/45 simplified gives 109/15
  6. So, 21/3 + 12/45 = 109/15
    In mixed form: 74/15

MathStep (Works offline)

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

Related:

© everydaycalculation.com