Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 81/28 and 9/90

1st number: 2 25/28, 2nd number: 9/90

81/28 + 9/90 is 419/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 90 is 1260

    Next, find the equivalent fraction of both fractional numbers with denominator 1260
  2. For the 1st fraction, since 28 × 45 = 1260,
    81/28 = 81 × 45/28 × 45 = 3645/1260
  3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
    9/90 = 9 × 14/90 × 14 = 126/1260
  4. Add the two like fractions:
    3645/1260 + 126/1260 = 3645 + 126/1260 = 3771/1260
  5. 3771/1260 simplified gives 419/140
  6. So, 81/28 + 9/90 = 419/140
    In mixed form: 2139/140

MathStep (Works offline)

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

Related:

© everydaycalculation.com