Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 81/18 and 90/45

1st number: 4 9/18, 2nd number: 2 0/45

81/18 + 90/45 is 13/2.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 45 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 18 × 5 = 90,
    81/18 = 81 × 5/18 × 5 = 405/90
  3. Likewise, for the 2nd fraction, since 45 × 2 = 90,
    90/45 = 90 × 2/45 × 2 = 180/90
  4. Add the two like fractions:
    405/90 + 180/90 = 405 + 180/90 = 585/90
  5. 585/90 simplified gives 13/2
  6. So, 81/18 + 90/45 = 13/2
    In mixed form: 61/2

MathStep (Works offline)

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

Related:

© everydaycalculation.com