Answers

Subtract 5/81 from 8/5

1^st number: 1 3/5, 2^nd number: 5/81

8/5 - 5/81 is 623/405.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 81 is 405
   
   Next, find the equivalent fraction of both fractional numbers with denominator 405
2. For the 1st fraction, since 5 × 81 = 405,
   8/5 = 8 × 81/5 × 81 = 648/405
3. Likewise, for the 2nd fraction, since 81 × 5 = 405,
   5/81 = 5 × 5/81 × 5 = 25/405
4. Subtract the two like fractions:
   648/405 - 25/405 = 648 - 25/405 = 623/405
5. In mixed form: 1218/405

MathStep (Works offline)

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

Related: ¹⁶/₅-⁵/₈₁ ⁸/₅-¹⁰/₈₁ ⁸/₁₀-⁵/₈₁ ²⁴/₅-⁵/₈₁ ⁸/₅-¹⁵/₈₁ ⁸/₁₅-⁵/₈₁ ⁴⁰/₅-⁵/₈₁ ⁸/₅-²⁵/₈₁ ⁸/₂₅-⁵/₈₁ ⁵⁶/₅-⁵/₈₁ ⁸/₅-³⁵/₈₁ ⁸/₃₅-⁵/₈₁

Subtract Fractions Calculator