Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 21/90 and 63/12

1st number: 21/90, 2nd number: 5 3/12

21/90 + 63/12 is 329/60.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 12 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 90 × 2 = 180,
    21/90 = 21 × 2/90 × 2 = 42/180
  3. Likewise, for the 2nd fraction, since 12 × 15 = 180,
    63/12 = 63 × 15/12 × 15 = 945/180
  4. Add the two like fractions:
    42/180 + 945/180 = 42 + 945/180 = 987/180
  5. 987/180 simplified gives 329/60
  6. So, 21/90 + 63/12 = 329/60
    In mixed form: 529/60

MathStep (Works offline)

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

Related:

© everydaycalculation.com