Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 20/42 and 4/80

20/42 + 4/80 is 221/420.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 1680
  2. For the 1st fraction, since 42 × 40 = 1680,
    20/42 = 20 × 40/42 × 40 = 800/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    4/80 = 4 × 21/80 × 21 = 84/1680
  4. Add the two like fractions:
    800/1680 + 84/1680 = 800 + 84/1680 = 884/1680
  5. 884/1680 simplified gives 221/420
  6. So, 20/42 + 4/80 = 221/420

MathStep (Works offline)

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

Related:

© everydaycalculation.com