Answers

Add 6/81 and 5/21

6/81 + 5/21 is 59/189.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 21 is 567
   
   Next, find the equivalent fraction of both fractional numbers with denominator 567
2. For the 1st fraction, since 81 × 7 = 567,
   6/81 = 6 × 7/81 × 7 = 42/567
3. Likewise, for the 2nd fraction, since 21 × 27 = 567,
   5/21 = 5 × 27/21 × 27 = 135/567
4. Add the two like fractions:
   42/567 + 135/567 = 42 + 135/567 = 177/567
5. 177/567 simplified gives 59/189
6. So, 6/81 + 5/21 = 59/189

MathStep (Works offline)

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

Related: ¹²/₈₁+⁵/₂₁ ⁶/₈₁+¹⁰/₂₁ ⁶/₈₁+⁵/₄₂ ¹⁸/₈₁+⁵/₂₁ ⁶/₈₁+¹⁵/₂₁ ⁶/₈₁+⁵/₆₃ ³⁰/₈₁+⁵/₂₁ ⁶/₈₁+²⁵/₂₁ ⁴²/₈₁+⁵/₂₁ ⁶/₈₁+³⁵/₂₁

Add Fractions Calculator