Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 72/20 and 42/28

1st number: 3 12/20, 2nd number: 1 14/28

72/20 + 42/28 is 51/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 28 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 20 × 7 = 140,
    72/20 = 72 × 7/20 × 7 = 504/140
  3. Likewise, for the 2nd fraction, since 28 × 5 = 140,
    42/28 = 42 × 5/28 × 5 = 210/140
  4. Add the two like fractions:
    504/140 + 210/140 = 504 + 210/140 = 714/140
  5. 714/140 simplified gives 51/10
  6. So, 72/20 + 42/28 = 51/10
    In mixed form: 51/10

MathStep (Works offline)

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

Related:

© everydaycalculation.com