Answers

Subtract 15/8 from 90/2

1^st number: 45 0/2, 2^nd number: 1 7/8

90/2 - 15/8 is 345/8.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 2 and 8 is 8
   
   Next, find the equivalent fraction of both fractional numbers with denominator 8
2. For the 1st fraction, since 2 × 4 = 8,
   90/2 = 90 × 4/2 × 4 = 360/8
3. Likewise, for the 2nd fraction, since 8 × 1 = 8,
   15/8 = 15 × 1/8 × 1 = 15/8
4. Subtract the two like fractions:
   360/8 - 15/8 = 360 - 15/8 = 345/8
5. In mixed form: 431/8

MathStep (Works offline)

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

Related: ⁹⁰/₂-³⁰/₈ ⁹⁰/₄-¹⁵/₈ ⁹⁰/₂-¹⁵/₁₆ ⁹⁰/₂-⁴⁵/₈ ⁹⁰/₆-¹⁵/₈ ⁹⁰/₂-¹⁵/₂₄ ⁹⁰/₂-⁷⁵/₈ ⁹⁰/₁₀-¹⁵/₈ ⁹⁰/₂-¹⁵/₄₀ ⁹⁰/₁₄-¹⁵/₈ ⁹⁰/₂-¹⁵/₅₆

Subtract Fractions Calculator