Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 81/4 and 21/10

1st number: 20 1/4, 2nd number: 2 1/10

81/4 + 21/10 is 447/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 10 is 20

    Next, find the equivalent fraction of both fractional numbers with denominator 20
  2. For the 1st fraction, since 4 × 5 = 20,
    81/4 = 81 × 5/4 × 5 = 405/20
  3. Likewise, for the 2nd fraction, since 10 × 2 = 20,
    21/10 = 21 × 2/10 × 2 = 42/20
  4. Add the two like fractions:
    405/20 + 42/20 = 405 + 42/20 = 447/20
  5. So, 81/4 + 21/10 = 447/20
    In mixed form: 227/20

MathStep (Works offline)

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

Related:

© everydaycalculation.com