Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 36/20 and 42/21

1st number: 1 16/20, 2nd number: 2 0/21

36/20 + 42/21 is 19/5.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 21 is 420
  2. For the 1st fraction, since 20 × 21 = 420,
    36/20 = 36 × 21/20 × 21 = 756/420
  3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
    42/21 = 42 × 20/21 × 20 = 840/420
  4. Add the two fractions:
    756/420 + 840/420 = 756 + 840/420 = 1596/420
  5. 1596/420 simplified gives 19/5
  6. So, 36/20 + 42/21 = 19/5
    In mixed form: 34/5

MathStep (Works offline)

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

Related:

© everydaycalculation.com