Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 90/81 and 70/90

1st number: 1 9/81, 2nd number: 70/90

90/81 + 70/90 is 17/9.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 81 and 90 is 810

    Next, find the equivalent fraction of both fractional numbers with denominator 810
  2. For the 1st fraction, since 81 × 10 = 810,
    90/81 = 90 × 10/81 × 10 = 900/810
  3. Likewise, for the 2nd fraction, since 90 × 9 = 810,
    70/90 = 70 × 9/90 × 9 = 630/810
  4. Add the two like fractions:
    900/810 + 630/810 = 900 + 630/810 = 1530/810
  5. 1530/810 simplified gives 17/9
  6. So, 90/81 + 70/90 = 17/9
    In mixed form: 18/9

MathStep (Works offline)

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

Related:

© everydaycalculation.com