Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 30/80 and 20/42

30/80 + 20/42 is 143/168.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 42 is 1680

    Next, find the equivalent fraction of both fractional numbers with denominator 1680
  2. For the 1st fraction, since 80 × 21 = 1680,
    30/80 = 30 × 21/80 × 21 = 630/1680
  3. Likewise, for the 2nd fraction, since 42 × 40 = 1680,
    20/42 = 20 × 40/42 × 40 = 800/1680
  4. Add the two like fractions:
    630/1680 + 800/1680 = 630 + 800/1680 = 1430/1680
  5. 1430/1680 simplified gives 143/168
  6. So, 30/80 + 20/42 = 143/168

MathStep (Works offline)

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

Related:

© everydaycalculation.com