Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 3/8 and 21/70

3/8 + 21/70 is 27/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 70 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 8 × 35 = 280,
    3/8 = 3 × 35/8 × 35 = 105/280
  3. Likewise, for the 2nd fraction, since 70 × 4 = 280,
    21/70 = 21 × 4/70 × 4 = 84/280
  4. Add the two like fractions:
    105/280 + 84/280 = 105 + 84/280 = 189/280
  5. 189/280 simplified gives 27/40
  6. So, 3/8 + 21/70 = 27/40

MathStep (Works offline)

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

Related:

© everydaycalculation.com