Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 28/70 and 15/8

1st number: 28/70, 2nd number: 1 7/8

28/70 + 15/8 is 91/40.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 70 × 4 = 280,
    28/70 = 28 × 4/70 × 4 = 112/280
  3. Likewise, for the 2nd fraction, since 8 × 35 = 280,
    15/8 = 15 × 35/8 × 35 = 525/280
  4. Add the two like fractions:
    112/280 + 525/280 = 112 + 525/280 = 637/280
  5. 637/280 simplified gives 91/40
  6. So, 28/70 + 15/8 = 91/40
    In mixed form: 211/40

MathStep (Works offline)

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

Related:

© everydaycalculation.com