Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 21/2 and 20/5

1st number: 10 1/2, 2nd number: 4 0/5

21/2 + 20/5 is 29/2.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 5 is 10

    Next, find the equivalent fraction of both fractional numbers with denominator 10
  2. For the 1st fraction, since 2 × 5 = 10,
    21/2 = 21 × 5/2 × 5 = 105/10
  3. Likewise, for the 2nd fraction, since 5 × 2 = 10,
    20/5 = 20 × 2/5 × 2 = 40/10
  4. Add the two like fractions:
    105/10 + 40/10 = 105 + 40/10 = 145/10
  5. 145/10 simplified gives 29/2
  6. So, 21/2 + 20/5 = 29/2
    In mixed form: 141/2

MathStep (Works offline)

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

Related:

© everydaycalculation.com