Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 27/90 and 18/70

27/90 + 18/70 is 39/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 70 is 630
  2. For the 1st fraction, since 90 × 7 = 630,
    27/90 = 27 × 7/90 × 7 = 189/630
  3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
    18/70 = 18 × 9/70 × 9 = 162/630
  4. Add the two fractions:
    189/630 + 162/630 = 189 + 162/630 = 351/630
  5. 351/630 simplified gives 39/70
  6. So, 27/90 + 18/70 = 39/70

MathStep (Works offline)

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

Related:

© everydaycalculation.com