Answers

Subtract 81/20 from 9/3

1^st number: 3 0/3, 2^nd number: 4 1/20

9/3 - 81/20 is -21/20.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 3 and 20 is 60
   
   Next, find the equivalent fraction of both fractional numbers with denominator 60
2. For the 1st fraction, since 3 × 20 = 60,
   9/3 = 9 × 20/3 × 20 = 180/60
3. Likewise, for the 2nd fraction, since 20 × 3 = 60,
   81/20 = 81 × 3/20 × 3 = 243/60
4. Subtract the two like fractions:
   180/60 - 243/60 = 180 - 243/60 = -63/60
5. After reducing the fraction, the answer is -21/20

MathStep (Works offline)

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

Related: ¹⁸/₃-⁸¹/₂₀ ⁹/₆-⁸¹/₂₀ ⁹/₃-⁸¹/₄₀ ²⁷/₃-⁸¹/₂₀ ⁹/₃-⁸¹/₆₀ ⁴⁵/₃-⁸¹/₂₀ ⁹/₁₅-⁸¹/₂₀ ⁶³/₃-⁸¹/₂₀ ⁹/₂₁-⁸¹/₂₀

Subtract Fractions Calculator