Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 42/90 and 48/81

42/90 + 48/81 is 143/135.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 810
  2. For the 1st fraction, since 90 × 9 = 810,
    42/90 = 42 × 9/90 × 9 = 378/810
  3. Likewise, for the 2nd fraction, since 81 × 10 = 810,
    48/81 = 48 × 10/81 × 10 = 480/810
  4. Add the two like fractions:
    378/810 + 480/810 = 378 + 480/810 = 858/810
  5. 858/810 simplified gives 143/135
  6. So, 42/90 + 48/81 = 143/135
    In mixed form: 18/135

MathStep (Works offline)

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

Related:

© everydaycalculation.com