Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 12/21 and 3/40

12/21 + 3/40 is 181/280.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 40 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 21 × 40 = 840,
    12/21 = 12 × 40/21 × 40 = 480/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    3/40 = 3 × 21/40 × 21 = 63/840
  4. Add the two like fractions:
    480/840 + 63/840 = 480 + 63/840 = 543/840
  5. 543/840 simplified gives 181/280
  6. So, 12/21 + 3/40 = 181/280

MathStep (Works offline)

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

Related:

© everydaycalculation.com