Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 72/90 and 14/21

72/90 + 14/21 is 22/15.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 90 × 7 = 630,
    72/90 = 72 × 7/90 × 7 = 504/630
  3. Likewise, for the 2nd fraction, since 21 × 30 = 630,
    14/21 = 14 × 30/21 × 30 = 420/630
  4. Add the two like fractions:
    504/630 + 420/630 = 504 + 420/630 = 924/630
  5. 924/630 simplified gives 22/15
  6. So, 72/90 + 14/21 = 22/15
    In mixed form: 17/15

MathStep (Works offline)

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

Related:

© everydaycalculation.com