Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 54/80 and 21/20

1st number: 54/80, 2nd number: 1 1/20

54/80 + 21/20 is 69/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 20 is 80

    Next, find the equivalent fraction of both fractional numbers with denominator 80
  2. For the 1st fraction, since 80 × 1 = 80,
    54/80 = 54 × 1/80 × 1 = 54/80
  3. Likewise, for the 2nd fraction, since 20 × 4 = 80,
    21/20 = 21 × 4/20 × 4 = 84/80
  4. Add the two like fractions:
    54/80 + 84/80 = 54 + 84/80 = 138/80
  5. 138/80 simplified gives 69/40
  6. So, 54/80 + 21/20 = 69/40
    In mixed form: 129/40

MathStep (Works offline)

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

Related:

© everydaycalculation.com