Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 30/70 and 21/4

1st number: 30/70, 2nd number: 5 1/4

30/70 + 21/4 is 159/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 4 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 70 × 2 = 140,
    30/70 = 30 × 2/70 × 2 = 60/140
  3. Likewise, for the 2nd fraction, since 4 × 35 = 140,
    21/4 = 21 × 35/4 × 35 = 735/140
  4. Add the two like fractions:
    60/140 + 735/140 = 60 + 735/140 = 795/140
  5. 795/140 simplified gives 159/28
  6. So, 30/70 + 21/4 = 159/28
    In mixed form: 519/28

MathStep (Works offline)

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

Related:

© everydaycalculation.com