Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 3/8 and 21/30

3/8 + 21/30 is 43/40.

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,
    3/8 = 3 × 15/8 × 15 = 45/120
  3. Likewise, for the 2nd fraction, since 30 × 4 = 120,
    21/30 = 21 × 4/30 × 4 = 84/120
  4. Add the two like fractions:
    45/120 + 84/120 = 45 + 84/120 = 129/120
  5. 129/120 simplified gives 43/40
  6. So, 3/8 + 21/30 = 43/40
    In mixed form: 13/40

MathStep (Works offline)

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

Related:

© everydaycalculation.com