Answers

Solutions by everydaycalculation.com

Everydaycalculation.com » Answers » Add fractions

Add 12/42 and 5/80

12/42 + 5/80 is 39/112.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 80 is 1680
  2. For the 1st fraction, since 42 × 40 = 1680,
    12/42 = 12 × 40/42 × 40 = 480/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    5/80 = 5 × 21/80 × 21 = 105/1680
  4. Add the two fractions:
    480/1680 + 105/1680 = 480 + 105/1680 = 585/1680
  5. After reducing the fraction, the answer is 39/112

MathStep (Works offline)

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

Related:

© everydaycalculation.com