Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 12/20 and 90/80

1st number: 12/20, 2nd number: 1 10/80

12/20 + 90/80 is 69/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 80 is 80

    Next, find the equivalent fraction of both fractional numbers with denominator 80
  2. For the 1st fraction, since 20 × 4 = 80,
    12/20 = 12 × 4/20 × 4 = 48/80
  3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
    90/80 = 90 × 1/80 × 1 = 90/80
  4. Add the two like fractions:
    48/80 + 90/80 = 48 + 90/80 = 138/80
  5. 138/80 simplified gives 69/40
  6. So, 12/20 + 90/80 = 69/40
    In mixed form: 129/40

MathStep (Works offline)

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

Related:

© everydaycalculation.com