Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 7/12 and 90/21

1st number: 7/12, 2nd number: 4 6/21

7/12 + 90/21 is 409/84.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 21 is 84
  2. For the 1st fraction, since 12 × 7 = 84,
    7/12 = 7 × 7/12 × 7 = 49/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    90/21 = 90 × 4/21 × 4 = 360/84
  4. Add the two fractions:
    49/84 + 360/84 = 49 + 360/84 = 409/84
  5. So, 7/12 + 90/21 = 409/84
    In mixed form: 473/84

MathStep (Works offline)

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

Related:

© everydaycalculation.com