Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 15/20 and 42/63

15/20 + 42/63 is 17/12.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 63 is 1260

    Next, find the equivalent fraction of both fractional numbers with denominator 1260
  2. For the 1st fraction, since 20 × 63 = 1260,
    15/20 = 15 × 63/20 × 63 = 945/1260
  3. Likewise, for the 2nd fraction, since 63 × 20 = 1260,
    42/63 = 42 × 20/63 × 20 = 840/1260
  4. Add the two like fractions:
    945/1260 + 840/1260 = 945 + 840/1260 = 1785/1260
  5. 1785/1260 simplified gives 17/12
  6. So, 15/20 + 42/63 = 17/12
    In mixed form: 15/12

MathStep (Works offline)

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

Related:

© everydaycalculation.com