Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 84/2 and 90/21

1st number: 42 0/2, 2nd number: 4 6/21

84/2 + 90/21 is 324/7.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 21 is 42
  2. For the 1st fraction, since 2 × 21 = 42,
    84/2 = 84 × 21/2 × 21 = 1764/42
  3. Likewise, for the 2nd fraction, since 21 × 2 = 42,
    90/21 = 90 × 2/21 × 2 = 180/42
  4. Add the two fractions:
    1764/42 + 180/42 = 1764 + 180/42 = 1944/42
  5. 1944/42 simplified gives 324/7
  6. So, 84/2 + 90/21 = 324/7
    In mixed form: 462/7

MathStep (Works offline)

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

Related:

© everydaycalculation.com