Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 18/27 and 5/21

18/27 + 5/21 is 19/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 27 and 21 is 189

    Next, find the equivalent fraction of both fractional numbers with denominator 189
  2. For the 1st fraction, since 27 × 7 = 189,
    18/27 = 18 × 7/27 × 7 = 126/189
  3. Likewise, for the 2nd fraction, since 21 × 9 = 189,
    5/21 = 5 × 9/21 × 9 = 45/189
  4. Add the two like fractions:
    126/189 + 45/189 = 126 + 45/189 = 171/189
  5. 171/189 simplified gives 19/21
  6. So, 18/27 + 5/21 = 19/21

MathStep (Works offline)

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

Related:

© everydaycalculation.com