Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 21/30 and 63/8

1st number: 21/30, 2nd number: 7 7/8

21/30 + 63/8 is 343/40.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 30 × 4 = 120,
    21/30 = 21 × 4/30 × 4 = 84/120
  3. Likewise, for the 2nd fraction, since 8 × 15 = 120,
    63/8 = 63 × 15/8 × 15 = 945/120
  4. Add the two like fractions:
    84/120 + 945/120 = 84 + 945/120 = 1029/120
  5. 1029/120 simplified gives 343/40
  6. So, 21/30 + 63/8 = 343/40
    In mixed form: 823/40

MathStep (Works offline)

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

Related:

© everydaycalculation.com