Answers

Subtract 10/81 from 30/15

1^st number: 2 0/15, 2^nd number: 10/81

30/15 - 10/81 is 152/81.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 81 is 405
   
   Next, find the equivalent fraction of both fractional numbers with denominator 405
2. For the 1st fraction, since 15 × 27 = 405,
   30/15 = 30 × 27/15 × 27 = 810/405
3. Likewise, for the 2nd fraction, since 81 × 5 = 405,
   10/81 = 10 × 5/81 × 5 = 50/405
4. Subtract the two like fractions:
   810/405 - 50/405 = 810 - 50/405 = 760/405
5. After reducing the fraction, the answer is 152/81
6. In mixed form: 171/81

MathStep (Works offline)

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

Related: ⁶⁰/₁₅-¹⁰/₈₁ ³⁰/₁₅-²⁰/₈₁ ⁹⁰/₁₅-¹⁰/₈₁ ³⁰/₁₅-³⁰/₈₁ ³⁰/₄₅-¹⁰/₈₁ ³⁰/₁₅-⁵⁰/₈₁ ³⁰/₇₅-¹⁰/₈₁ ³⁰/₁₅-⁷⁰/₈₁

Subtract Fractions Calculator