Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 12/8 and 81/30

1st number: 1 4/8, 2nd number: 2 21/30

12/8 + 81/30 is 21/5.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 30 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 8 × 15 = 120,
    12/8 = 12 × 15/8 × 15 = 180/120
  3. Likewise, for the 2nd fraction, since 30 × 4 = 120,
    81/30 = 81 × 4/30 × 4 = 324/120
  4. Add the two like fractions:
    180/120 + 324/120 = 180 + 324/120 = 504/120
  5. 504/120 simplified gives 21/5
  6. So, 12/8 + 81/30 = 21/5
    In mixed form: 41/5

MathStep (Works offline)

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

Related:

© everydaycalculation.com