Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 8/40 and 15/42

8/40 + 15/42 is 39/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 42 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 40 × 21 = 840,
    8/40 = 8 × 21/40 × 21 = 168/840
  3. Likewise, for the 2nd fraction, since 42 × 20 = 840,
    15/42 = 15 × 20/42 × 20 = 300/840
  4. Add the two like fractions:
    168/840 + 300/840 = 168 + 300/840 = 468/840
  5. 468/840 simplified gives 39/70
  6. So, 8/40 + 15/42 = 39/70

MathStep (Works offline)

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

Related:

© everydaycalculation.com