Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 28/21 and 25/8

1st number: 1 7/21, 2nd number: 3 1/8

28/21 + 25/8 is 107/24.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 8 is 168
  2. For the 1st fraction, since 21 × 8 = 168,
    28/21 = 28 × 8/21 × 8 = 224/168
  3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
    25/8 = 25 × 21/8 × 21 = 525/168
  4. Add the two fractions:
    224/168 + 525/168 = 224 + 525/168 = 749/168
  5. 749/168 simplified gives 107/24
  6. So, 28/21 + 25/8 = 107/24
    In mixed form: 411/24

MathStep (Works offline)

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

Related:

© everydaycalculation.com