Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 7/5 and 21/28

1st number: 1 2/5, 2nd number: 21/28

7/5 + 21/28 is 43/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 28 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 5 × 28 = 140,
    7/5 = 7 × 28/5 × 28 = 196/140
  3. Likewise, for the 2nd fraction, since 28 × 5 = 140,
    21/28 = 21 × 5/28 × 5 = 105/140
  4. Add the two like fractions:
    196/140 + 105/140 = 196 + 105/140 = 301/140
  5. 301/140 simplified gives 43/20
  6. So, 7/5 + 21/28 = 43/20
    In mixed form: 23/20

MathStep (Works offline)

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

Related:

© everydaycalculation.com