Answers

Subtract 18/8 from 90/80

1^st number: 1 10/80, 2^nd number: 2 2/8

90/80 - 18/8 is -9/8.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 8 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 80 × 1 = 80,
   90/80 = 90 × 1/80 × 1 = 90/80
3. Likewise, for the 2nd fraction, since 8 × 10 = 80,
   18/8 = 18 × 10/8 × 10 = 180/80
4. Subtract the two like fractions:
   90/80 - 180/80 = 90 - 180/80 = -90/80
5. After reducing the fraction, the answer is -9/8

MathStep (Works offline)

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

Related: ⁹⁰/₈₀-³⁶/₈ ⁹⁰/₈₀-¹⁸/₁₆ ⁹⁰/₈₀-⁵⁴/₈ ⁹⁰/₈₀-¹⁸/₂₄ ⁹⁰/₈₀-⁹⁰/₈ ⁹⁰/₈₀-¹⁸/₄₀ ⁹⁰/₈₀-¹⁸/₅₆

Subtract Fractions Calculator