Answers

Subtract 45/20 from 3/12

1^st number: 3/12, 2^nd number: 2 5/20

3/12 - 45/20 is -2/1.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 20 is 60
   
   Next, find the equivalent fraction of both fractional numbers with denominator 60
2. For the 1st fraction, since 12 × 5 = 60,
   3/12 = 3 × 5/12 × 5 = 15/60
3. Likewise, for the 2nd fraction, since 20 × 3 = 60,
   45/20 = 45 × 3/20 × 3 = 135/60
4. Subtract the two like fractions:
   15/60 - 135/60 = 15 - 135/60 = -120/60
5. After reducing the fraction, the answer is -2/1

MathStep (Works offline)

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

Related: ⁶/₁₂-⁴⁵/₂₀ ³/₁₂-⁹⁰/₂₀ ³/₂₄-⁴⁵/₂₀ ³/₁₂-⁴⁵/₄₀ ⁹/₁₂-⁴⁵/₂₀ ³/₃₆-⁴⁵/₂₀ ³/₁₂-⁴⁵/₆₀ ¹⁵/₁₂-⁴⁵/₂₀ ³/₆₀-⁴⁵/₂₀ ²¹/₁₂-⁴⁵/₂₀ ³/₈₄-⁴⁵/₂₀

Subtract Fractions Calculator