Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 42/54 and 21/42

42/54 + 21/42 is 23/18.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 54 and 42 is 378

    Next, find the equivalent fraction of both fractional numbers with denominator 378
  2. For the 1st fraction, since 54 × 7 = 378,
    42/54 = 42 × 7/54 × 7 = 294/378
  3. Likewise, for the 2nd fraction, since 42 × 9 = 378,
    21/42 = 21 × 9/42 × 9 = 189/378
  4. Add the two like fractions:
    294/378 + 189/378 = 294 + 189/378 = 483/378
  5. 483/378 simplified gives 23/18
  6. So, 42/54 + 21/42 = 23/18
    In mixed form: 15/18

MathStep (Works offline)

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

Related:

© everydaycalculation.com