Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 18/40 and 3/84

18/40 + 3/84 is 17/35.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 84 is 840
  2. For the 1st fraction, since 40 × 21 = 840,
    18/40 = 18 × 21/40 × 21 = 378/840
  3. Likewise, for the 2nd fraction, since 84 × 10 = 840,
    3/84 = 3 × 10/84 × 10 = 30/840
  4. Add the two fractions:
    378/840 + 30/840 = 378 + 30/840 = 408/840
  5. 408/840 simplified gives 17/35
  6. So, 18/40 + 3/84 = 17/35

MathStep (Works offline)

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

Related:

© everydaycalculation.com