Answers

Subtract 7/81 from 25/12

1^st number: 2 1/12, 2^nd number: 7/81

25/12 - 7/81 is 647/324.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 81 is 324
   
   Next, find the equivalent fraction of both fractional numbers with denominator 324
2. For the 1st fraction, since 12 × 27 = 324,
   25/12 = 25 × 27/12 × 27 = 675/324
3. Likewise, for the 2nd fraction, since 81 × 4 = 324,
   7/81 = 7 × 4/81 × 4 = 28/324
4. Subtract the two like fractions:
   675/324 - 28/324 = 675 - 28/324 = 647/324
5. In mixed form: 1323/324

MathStep (Works offline)

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

Related: ⁵⁰/₁₂-⁷/₈₁ ²⁵/₁₂-¹⁴/₈₁ ²⁵/₂₄-⁷/₈₁ ⁷⁵/₁₂-⁷/₈₁ ²⁵/₁₂-²¹/₈₁ ²⁵/₃₆-⁷/₈₁ ²⁵/₁₂-³⁵/₈₁ ²⁵/₆₀-⁷/₈₁ ²⁵/₁₂-⁴⁹/₈₁ ²⁵/₈₄-⁷/₈₁

Subtract Fractions Calculator