Answers

Add 10/81 and 81/4

1^st number: 10/81, 2^nd number: 20 1/4

10/81 + 81/4 is 6601/324.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 4 is 324
   
   Next, find the equivalent fraction of both fractional numbers with denominator 324
2. For the 1st fraction, since 81 × 4 = 324,
   10/81 = 10 × 4/81 × 4 = 40/324
3. Likewise, for the 2nd fraction, since 4 × 81 = 324,
   81/4 = 81 × 81/4 × 81 = 6561/324
4. Add the two like fractions:
   40/324 + 6561/324 = 40 + 6561/324 = 6601/324
5. So, 10/81 + 81/4 = 6601/324
   In mixed form: 20121/324

MathStep (Works offline)

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

Related: ²⁰/₈₁+⁸¹/₄ ¹⁰/₈₁+⁸¹/₈ ³⁰/₈₁+⁸¹/₄ ¹⁰/₈₁+⁸¹/₁₂ ⁵⁰/₈₁+⁸¹/₄ ¹⁰/₈₁+⁸¹/₂₀ ⁷⁰/₈₁+⁸¹/₄ ¹⁰/₈₁+⁸¹/₂₈

Add Fractions Calculator