Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 20/21 and 56/72

20/21 + 56/72 is 109/63.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 72 is 504

    Next, find the equivalent fraction of both fractional numbers with denominator 504
  2. For the 1st fraction, since 21 × 24 = 504,
    20/21 = 20 × 24/21 × 24 = 480/504
  3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
    56/72 = 56 × 7/72 × 7 = 392/504
  4. Add the two like fractions:
    480/504 + 392/504 = 480 + 392/504 = 872/504
  5. 872/504 simplified gives 109/63
  6. So, 20/21 + 56/72 = 109/63
    In mixed form: 146/63

MathStep (Works offline)

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

Related:

© everydaycalculation.com