Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 2/5 and 21/10

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

2/5 + 21/10 is 5/2.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 10
  2. For the 1st fraction, since 5 × 2 = 10,
    2/5 = 2 × 2/5 × 2 = 4/10
  3. Likewise, for the 2nd fraction, since 10 × 1 = 10,
    21/10 = 21 × 1/10 × 1 = 21/10
  4. Add the two like fractions:
    4/10 + 21/10 = 4 + 21/10 = 25/10
  5. 25/10 simplified gives 5/2
  6. So, 2/5 + 21/10 = 5/2
    In mixed form: 21/2

MathStep (Works offline)

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

Related:

© everydaycalculation.com