Answers

Subtract 35/81 from 18/28

18/28 - 35/81 is 239/1134.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 81 is 2268
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2268
2. For the 1st fraction, since 28 × 81 = 2268,
   18/28 = 18 × 81/28 × 81 = 1458/2268
3. Likewise, for the 2nd fraction, since 81 × 28 = 2268,
   35/81 = 35 × 28/81 × 28 = 980/2268
4. Subtract the two like fractions:
   1458/2268 - 980/2268 = 1458 - 980/2268 = 478/2268
5. After reducing the fraction, the answer is 239/1134

MathStep (Works offline)

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

Related: ³⁶/₂₈-³⁵/₈₁ ¹⁸/₂₈-⁷⁰/₈₁ ¹⁸/₅₆-³⁵/₈₁ ⁵⁴/₂₈-³⁵/₈₁ ¹⁸/₈₄-³⁵/₈₁ ⁹⁰/₂₈-³⁵/₈₁

Subtract Fractions Calculator