Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 8/21 and 21/20

1st number: 8/21, 2nd number: 1 1/20

8/21 + 21/20 is 601/420.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 20 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 21 × 20 = 420,
    8/21 = 8 × 20/21 × 20 = 160/420
  3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
    21/20 = 21 × 21/20 × 21 = 441/420
  4. Add the two like fractions:
    160/420 + 441/420 = 160 + 441/420 = 601/420
  5. So, 8/21 + 21/20 = 601/420
    In mixed form: 1181/420

MathStep (Works offline)

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

Related:

© everydaycalculation.com