Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 18/80 and 63/21

1st number: 18/80, 2nd number: 3 0/21

18/80 + 63/21 is 129/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 21 is 1680

    Next, find the equivalent fraction of both fractional numbers with denominator 1680
  2. For the 1st fraction, since 80 × 21 = 1680,
    18/80 = 18 × 21/80 × 21 = 378/1680
  3. Likewise, for the 2nd fraction, since 21 × 80 = 1680,
    63/21 = 63 × 80/21 × 80 = 5040/1680
  4. Add the two like fractions:
    378/1680 + 5040/1680 = 378 + 5040/1680 = 5418/1680
  5. 5418/1680 simplified gives 129/40
  6. So, 18/80 + 63/21 = 129/40
    In mixed form: 39/40

MathStep (Works offline)

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

Related:

© everydaycalculation.com