Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 12/15 and 21/16

1st number: 12/15, 2nd number: 1 5/16

12/15 + 21/16 is 169/80.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 16 is 240

    Next, find the equivalent fraction of both fractional numbers with denominator 240
  2. For the 1st fraction, since 15 × 16 = 240,
    12/15 = 12 × 16/15 × 16 = 192/240
  3. Likewise, for the 2nd fraction, since 16 × 15 = 240,
    21/16 = 21 × 15/16 × 15 = 315/240
  4. Add the two like fractions:
    192/240 + 315/240 = 192 + 315/240 = 507/240
  5. 507/240 simplified gives 169/80
  6. So, 12/15 + 21/16 = 169/80
    In mixed form: 29/80

MathStep (Works offline)

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

Related:

© everydaycalculation.com