Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 8/20 and 15/90

8/20 + 15/90 is 17/30.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 90 is 180
  2. For the 1st fraction, since 20 × 9 = 180,
    8/20 = 8 × 9/20 × 9 = 72/180
  3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
    15/90 = 15 × 2/90 × 2 = 30/180
  4. Add the two fractions:
    72/180 + 30/180 = 72 + 30/180 = 102/180
  5. 102/180 simplified gives 17/30
  6. So, 8/20 + 15/90 = 17/30

MathStep (Works offline)

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

Related:

© everydaycalculation.com