Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 21/80 and 18/9

1st number: 21/80, 2nd number: 2 0/9

21/80 + 18/9 is 181/80.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 9 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 80 × 9 = 720,
    21/80 = 21 × 9/80 × 9 = 189/720
  3. Likewise, for the 2nd fraction, since 9 × 80 = 720,
    18/9 = 18 × 80/9 × 80 = 1440/720
  4. Add the two like fractions:
    189/720 + 1440/720 = 189 + 1440/720 = 1629/720
  5. 1629/720 simplified gives 181/80
  6. So, 21/80 + 18/9 = 181/80
    In mixed form: 221/80

MathStep (Works offline)

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

Related:

© everydaycalculation.com