Answers

Subtract 8/18 from 6/15

6/15 - 8/18 is -2/45.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 18 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 15 × 6 = 90,
   6/15 = 6 × 6/15 × 6 = 36/90
3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
   8/18 = 8 × 5/18 × 5 = 40/90
4. Subtract the two like fractions:
   36/90 - 40/90 = 36 - 40/90 = -4/90
5. After reducing the fraction, the answer is -2/45

MathStep (Works offline)

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

Related: ¹²/₁₅-⁸/₁₈ ⁶/₁₅-¹⁶/₁₈ ⁶/₃₀-⁸/₁₈ ⁶/₁₅-⁸/₃₆ ¹⁸/₁₅-⁸/₁₈ ⁶/₁₅-²⁴/₁₈ ⁶/₄₅-⁸/₁₈ ⁶/₁₅-⁸/₅₄ ³⁰/₁₅-⁸/₁₈ ⁶/₁₅-⁴⁰/₁₈ ⁶/₇₅-⁸/₁₈ ⁶/₁₅-⁸/₉₀ ⁴²/₁₅-⁸/₁₈ ⁶/₁₅-⁵⁶/₁₈

Subtract Fractions Calculator