Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 1/40 and 18/21

1/40 + 18/21 is 247/280.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 40 × 21 = 840,
    1/40 = 1 × 21/40 × 21 = 21/840
  3. Likewise, for the 2nd fraction, since 21 × 40 = 840,
    18/21 = 18 × 40/21 × 40 = 720/840
  4. Add the two like fractions:
    21/840 + 720/840 = 21 + 720/840 = 741/840
  5. 741/840 simplified gives 247/280
  6. So, 1/40 + 18/21 = 247/280

MathStep (Works offline)

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

Related:

© everydaycalculation.com