Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 20/42 and 90/7

1st number: 20/42, 2nd number: 12 6/7

20/42 + 90/7 is 40/3.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 7 is 42

    Next, find the equivalent fraction of both fractional numbers with denominator 42
  2. For the 1st fraction, since 42 × 1 = 42,
    20/42 = 20 × 1/42 × 1 = 20/42
  3. Likewise, for the 2nd fraction, since 7 × 6 = 42,
    90/7 = 90 × 6/7 × 6 = 540/42
  4. Add the two like fractions:
    20/42 + 540/42 = 20 + 540/42 = 560/42
  5. 560/42 simplified gives 40/3
  6. So, 20/42 + 90/7 = 40/3
    In mixed form: 131/3

MathStep (Works offline)

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

Related:

© everydaycalculation.com