Answers

Subtract 3/81 from 1/5

1/5 - 3/81 is 22/135.

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,
   1/5 = 1 × 81/5 × 81 = 81/405
3. Likewise, for the 2nd fraction, since 81 × 5 = 405,
   3/81 = 3 × 5/81 × 5 = 15/405
4. Subtract the two like fractions:
   81/405 - 15/405 = 81 - 15/405 = 66/405
5. After reducing the fraction, the answer is 22/135

MathStep (Works offline)

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

Related: ²/₅-³/₈₁ ¹/₅-⁶/₈₁ ¹/₁₀-³/₈₁ ³/₅-³/₈₁ ¹/₅-⁹/₈₁ ¹/₁₅-³/₈₁ ¹/₅-¹⁵/₈₁ ¹/₂₅-³/₈₁ ⁷/₅-³/₈₁ ¹/₅-²¹/₈₁ ¹/₃₅-³/₈₁

Subtract Fractions Calculator