Answers

Add 28/81 and 84/5

1^st number: 28/81, 2^nd number: 16 4/5

28/81 + 84/5 is 6944/405.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 5 is 405
   
   Next, find the equivalent fraction of both fractional numbers with denominator 405
2. For the 1st fraction, since 81 × 5 = 405,
   28/81 = 28 × 5/81 × 5 = 140/405
3. Likewise, for the 2nd fraction, since 5 × 81 = 405,
   84/5 = 84 × 81/5 × 81 = 6804/405
4. Add the two like fractions:
   140/405 + 6804/405 = 140 + 6804/405 = 6944/405
5. So, 28/81 + 84/5 = 6944/405
   In mixed form: 1759/405

MathStep (Works offline)

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

Related: ⁵⁶/₈₁+⁸⁴/₅ ²⁸/₈₁+⁸⁴/₁₀ ⁸⁴/₈₁+⁸⁴/₅ ²⁸/₈₁+⁸⁴/₁₅ ²⁸/₈₁+⁸⁴/₂₅ ²⁸/₈₁+⁸⁴/₃₅

Add Fractions Calculator