Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 28/7 and 20/90

1st number: 4 0/7, 2nd number: 20/90

28/7 + 20/90 is 38/9.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 90 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 7 × 90 = 630,
    28/7 = 28 × 90/7 × 90 = 2520/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    20/90 = 20 × 7/90 × 7 = 140/630
  4. Add the two like fractions:
    2520/630 + 140/630 = 2520 + 140/630 = 2660/630
  5. 2660/630 simplified gives 38/9
  6. So, 28/7 + 20/90 = 38/9
    In mixed form: 42/9

MathStep (Works offline)

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

Related:

© everydaycalculation.com