Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 18/28 and 21/20

1st number: 18/28, 2nd number: 1 1/20

18/28 + 21/20 is 237/140.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 28 × 5 = 140,
    18/28 = 18 × 5/28 × 5 = 90/140
  3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
    21/20 = 21 × 7/20 × 7 = 147/140
  4. Add the two like fractions:
    90/140 + 147/140 = 90 + 147/140 = 237/140
  5. So, 18/28 + 21/20 = 237/140
    In mixed form: 197/140

MathStep (Works offline)

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

Related:

© everydaycalculation.com