Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Add fractions

Add 28/70 and 7/40

28/70 + 7/40 is 23/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 40 is 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 40 × 7 = 280,
    7/40 = 7 × 7/40 × 7 = 49/280
  4. Add the two fractions:
    112/280 + 49/280 = 112 + 49/280 = 161/280
  5. After reducing the fraction, the answer is 23/40

MathStep (Works offline)

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

Related:

© everydaycalculation.com