Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 9/21 and 2/90

9/21 + 2/90 is 142/315.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 90 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 21 × 30 = 630,
    9/21 = 9 × 30/21 × 30 = 270/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    2/90 = 2 × 7/90 × 7 = 14/630
  4. Add the two like fractions:
    270/630 + 14/630 = 270 + 14/630 = 284/630
  5. 284/630 simplified gives 142/315
  6. So, 9/21 + 2/90 = 142/315

MathStep (Works offline)

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

Related:

© everydaycalculation.com