Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 20/21 and 2/80

20/21 + 2/80 is 821/840.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 80 is 1680

    Next, find the equivalent fraction of both fractional numbers with denominator 1680
  2. For the 1st fraction, since 21 × 80 = 1680,
    20/21 = 20 × 80/21 × 80 = 1600/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    2/80 = 2 × 21/80 × 21 = 42/1680
  4. Add the two like fractions:
    1600/1680 + 42/1680 = 1600 + 42/1680 = 1642/1680
  5. 1642/1680 simplified gives 821/840
  6. So, 20/21 + 2/80 = 821/840

MathStep (Works offline)

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

Related:

© everydaycalculation.com