Answers

Subtract 8/81 from 4/10

4/10 - 8/81 is 122/405.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 81 is 810
   
   Next, find the equivalent fraction of both fractional numbers with denominator 810
2. For the 1st fraction, since 10 × 81 = 810,
   4/10 = 4 × 81/10 × 81 = 324/810
3. Likewise, for the 2nd fraction, since 81 × 10 = 810,
   8/81 = 8 × 10/81 × 10 = 80/810
4. Subtract the two like fractions:
   324/810 - 80/810 = 324 - 80/810 = 244/810
5. After reducing the fraction, the answer is 122/405

MathStep (Works offline)

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

Related: ⁸/₁₀-⁸/₈₁ ⁴/₁₀-¹⁶/₈₁ ⁴/₂₀-⁸/₈₁ ¹²/₁₀-⁸/₈₁ ⁴/₁₀-²⁴/₈₁ ⁴/₃₀-⁸/₈₁ ²⁰/₁₀-⁸/₈₁ ⁴/₁₀-⁴⁰/₈₁ ⁴/₅₀-⁸/₈₁ ²⁸/₁₀-⁸/₈₁ ⁴/₁₀-⁵⁶/₈₁ ⁴/₇₀-⁸/₈₁

Subtract Fractions Calculator