Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 8/21 and 42/81

8/21 + 42/81 is 170/189.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 81 is 567

    Next, find the equivalent fraction of both fractional numbers with denominator 567
  2. For the 1st fraction, since 21 × 27 = 567,
    8/21 = 8 × 27/21 × 27 = 216/567
  3. Likewise, for the 2nd fraction, since 81 × 7 = 567,
    42/81 = 42 × 7/81 × 7 = 294/567
  4. Add the two like fractions:
    216/567 + 294/567 = 216 + 294/567 = 510/567
  5. 510/567 simplified gives 170/189
  6. So, 8/21 + 42/81 = 170/189

MathStep (Works offline)

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

Related:

© everydaycalculation.com