Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 28/40 and 81/45

1st number: 28/40, 2nd number: 1 36/45

28/40 + 81/45 is 5/2.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 45 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 40 × 9 = 360,
    28/40 = 28 × 9/40 × 9 = 252/360
  3. Likewise, for the 2nd fraction, since 45 × 8 = 360,
    81/45 = 81 × 8/45 × 8 = 648/360
  4. Add the two like fractions:
    252/360 + 648/360 = 252 + 648/360 = 900/360
  5. 900/360 simplified gives 5/2
  6. So, 28/40 + 81/45 = 5/2
    In mixed form: 21/2

MathStep (Works offline)

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

Related:

© everydaycalculation.com