Answers

Subtract 18/84 from 9/42

9/42 - 18/84 is 0/1.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 84 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 42 × 2 = 84,
   9/42 = 9 × 2/42 × 2 = 18/84
3. Likewise, for the 2nd fraction, since 84 × 1 = 84,
   18/84 = 18 × 1/84 × 1 = 18/84
4. Subtract the two like fractions:
   18/84 - 18/84 = 18 - 18/84 = 0/84
5. The answer is 0

MathStep (Works offline)

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

Related: ¹⁸/₄₂-¹⁸/₈₄ ⁹/₄₂-³⁶/₈₄ ⁹/₈₄-¹⁸/₈₄ ²⁷/₄₂-¹⁸/₈₄ ⁹/₄₂-⁵⁴/₈₄ ⁴⁵/₄₂-¹⁸/₈₄ ⁹/₄₂-⁹⁰/₈₄ ⁶³/₄₂-¹⁸/₈₄

Subtract Fractions Calculator