Answers

Subtract 70/27 from 18/81

1^st number: 18/81, 2^nd number: 2 16/27

18/81 - 70/27 is -64/27.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 27 is 81
   
   Next, find the equivalent fraction of both fractional numbers with denominator 81
2. For the 1st fraction, since 81 × 1 = 81,
   18/81 = 18 × 1/81 × 1 = 18/81
3. Likewise, for the 2nd fraction, since 27 × 3 = 81,
   70/27 = 70 × 3/27 × 3 = 210/81
4. Subtract the two like fractions:
   18/81 - 210/81 = 18 - 210/81 = -192/81
5. After reducing the fraction, the answer is -64/27

MathStep (Works offline)

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

Related: ³⁶/₈₁-⁷⁰/₂₇ ¹⁸/₈₁-⁷⁰/₅₄ ⁵⁴/₈₁-⁷⁰/₂₇ ¹⁸/₈₁-⁷⁰/₈₁ ⁹⁰/₈₁-⁷⁰/₂₇

Subtract Fractions Calculator