Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 40/42 and 28/20

1st number: 40/42, 2nd number: 1 8/20

40/42 + 28/20 is 247/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 20 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 42 × 10 = 420,
    40/42 = 40 × 10/42 × 10 = 400/420
  3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
    28/20 = 28 × 21/20 × 21 = 588/420
  4. Add the two like fractions:
    400/420 + 588/420 = 400 + 588/420 = 988/420
  5. 988/420 simplified gives 247/105
  6. So, 40/42 + 28/20 = 247/105
    In mixed form: 237/105

MathStep (Works offline)

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

Related:

© everydaycalculation.com