Answers

Subtract 80/40 from 24/18

1^st number: 1 6/18, 2^nd number: 2 0/40

24/18 - 80/40 is -2/3.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 40 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 18 × 20 = 360,
   24/18 = 24 × 20/18 × 20 = 480/360
3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
   80/40 = 80 × 9/40 × 9 = 720/360
4. Subtract the two like fractions:
   480/360 - 720/360 = 480 - 720/360 = -240/360
5. After reducing the fraction, the answer is -2/3

MathStep (Works offline)

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

Related: ⁴⁸/₁₈-⁸⁰/₄₀ ²⁴/₃₆-⁸⁰/₄₀ ⁷²/₁₈-⁸⁰/₄₀ ²⁴/₅₄-⁸⁰/₄₀ ²⁴/₉₀-⁸⁰/₄₀

Subtract Fractions Calculator