Answers

Subtract 7/16 from 15/81

15/81 - 7/16 is -109/432.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 16 is 1296
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1296
2. For the 1st fraction, since 81 × 16 = 1296,
   15/81 = 15 × 16/81 × 16 = 240/1296
3. Likewise, for the 2nd fraction, since 16 × 81 = 1296,
   7/16 = 7 × 81/16 × 81 = 567/1296
4. Subtract the two like fractions:
   240/1296 - 567/1296 = 240 - 567/1296 = -327/1296
5. After reducing the fraction, the answer is -109/432

MathStep (Works offline)

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

Related: ³⁰/₈₁-⁷/₁₆ ¹⁵/₈₁-¹⁴/₁₆ ¹⁵/₈₁-⁷/₃₂ ⁴⁵/₈₁-⁷/₁₆ ¹⁵/₈₁-²¹/₁₆ ¹⁵/₈₁-⁷/₄₈ ⁷⁵/₈₁-⁷/₁₆ ¹⁵/₈₁-³⁵/₁₆ ¹⁵/₈₁-⁷/₈₀ ¹⁵/₈₁-⁴⁹/₁₆

Subtract Fractions Calculator