Answers

Subtract 5/4 from 9/20

1^st number: 9/20, 2^nd number: 1 1/4

9/20 - 5/4 is -4/5.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 4 is 20
   
   Next, find the equivalent fraction of both fractional numbers with denominator 20
2. For the 1st fraction, since 20 × 1 = 20,
   9/20 = 9 × 1/20 × 1 = 9/20
3. Likewise, for the 2nd fraction, since 4 × 5 = 20,
   5/4 = 5 × 5/4 × 5 = 25/20
4. Subtract the two like fractions:
   9/20 - 25/20 = 9 - 25/20 = -16/20
5. After reducing the fraction, the answer is -4/5

MathStep (Works offline)

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

Related: ¹⁸/₂₀-⁵/₄ ⁹/₂₀-¹⁰/₄ ⁹/₄₀-⁵/₄ ⁹/₂₀-⁵/₈ ²⁷/₂₀-⁵/₄ ⁹/₂₀-¹⁵/₄ ⁹/₆₀-⁵/₄ ⁹/₂₀-⁵/₁₂ ⁴⁵/₂₀-⁵/₄ ⁹/₂₀-²⁵/₄ ⁹/₂₀-⁵/₂₀ ⁶³/₂₀-⁵/₄ ⁹/₂₀-³⁵/₄ ⁹/₂₀-⁵/₂₈

Subtract Fractions Calculator