Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 81/42 and 15/81

1st number: 1 39/42, 2nd number: 15/81

81/42 + 15/81 is 799/378.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 81 is 1134

    Next, find the equivalent fraction of both fractional numbers with denominator 1134
  2. For the 1st fraction, since 42 × 27 = 1134,
    81/42 = 81 × 27/42 × 27 = 2187/1134
  3. Likewise, for the 2nd fraction, since 81 × 14 = 1134,
    15/81 = 15 × 14/81 × 14 = 210/1134
  4. Add the two like fractions:
    2187/1134 + 210/1134 = 2187 + 210/1134 = 2397/1134
  5. 2397/1134 simplified gives 799/378
  6. So, 81/42 + 15/81 = 799/378
    In mixed form: 243/378

MathStep (Works offline)

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

Related:

© everydaycalculation.com