Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 28/20 and 90/12

1st number: 1 8/20, 2nd number: 7 6/12

28/20 + 90/12 is 89/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 12 is 60

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 20 × 3 = 60,
    28/20 = 28 × 3/20 × 3 = 84/60
  3. Likewise, for the 2nd fraction, since 12 × 5 = 60,
    90/12 = 90 × 5/12 × 5 = 450/60
  4. Add the two like fractions:
    84/60 + 450/60 = 84 + 450/60 = 534/60
  5. 534/60 simplified gives 89/10
  6. So, 28/20 + 90/12 = 89/10
    In mixed form: 89/10

MathStep (Works offline)

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

Related:

© everydaycalculation.com