Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 21/36 and 20/45

21/36 + 20/45 is 37/36.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 36 and 45 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 36 × 5 = 180,
    21/36 = 21 × 5/36 × 5 = 105/180
  3. Likewise, for the 2nd fraction, since 45 × 4 = 180,
    20/45 = 20 × 4/45 × 4 = 80/180
  4. Add the two like fractions:
    105/180 + 80/180 = 105 + 80/180 = 185/180
  5. 185/180 simplified gives 37/36
  6. So, 21/36 + 20/45 = 37/36
    In mixed form: 11/36

MathStep (Works offline)

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

Related:

© everydaycalculation.com