Answers

Subtract 80/18 from 25/15

1^st number: 1 10/15, 2^nd number: 4 8/18

25/15 - 80/18 is -25/9.

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,
   25/15 = 25 × 6/15 × 6 = 150/90
3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
   80/18 = 80 × 5/18 × 5 = 400/90
4. Subtract the two like fractions:
   150/90 - 400/90 = 150 - 400/90 = -250/90
5. After reducing the fraction, the answer is -25/9

MathStep (Works offline)

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

Related: ⁵⁰/₁₅-⁸⁰/₁₈ ²⁵/₃₀-⁸⁰/₁₈ ²⁵/₁₅-⁸⁰/₃₆ ⁷⁵/₁₅-⁸⁰/₁₈ ²⁵/₄₅-⁸⁰/₁₈ ²⁵/₁₅-⁸⁰/₅₄ ²⁵/₇₅-⁸⁰/₁₈ ²⁵/₁₅-⁸⁰/₉₀

Subtract Fractions Calculator