Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Add fractions

Add 21/30 and 90/81

1st number: 21/30, 2nd number: 1 9/81

21/30 + 90/81 is 163/90.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 81 is 810
  2. For the 1st fraction, since 30 × 27 = 810,
    21/30 = 21 × 27/30 × 27 = 567/810
  3. Likewise, for the 2nd fraction, since 81 × 10 = 810,
    90/81 = 90 × 10/81 × 10 = 900/810
  4. Add the two fractions:
    567/810 + 900/810 = 567 + 900/810 = 1467/810
  5. After reducing the fraction, the answer is 163/90
  6. In mixed form: 173/90

MathStep (Works offline)

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

Related:

© everydaycalculation.com