Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 18/4 and 45/20

1st number: 4 2/4, 2nd number: 2 5/20

18/4 + 45/20 is 27/4.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 20 is 20

    Next, find the equivalent fraction of both fractional numbers with denominator 20
  2. For the 1st fraction, since 4 × 5 = 20,
    18/4 = 18 × 5/4 × 5 = 90/20
  3. Likewise, for the 2nd fraction, since 20 × 1 = 20,
    45/20 = 45 × 1/20 × 1 = 45/20
  4. Add the two like fractions:
    90/20 + 45/20 = 90 + 45/20 = 135/20
  5. 135/20 simplified gives 27/4
  6. So, 18/4 + 45/20 = 27/4
    In mixed form: 63/4

MathStep (Works offline)

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

Related:

© everydaycalculation.com