Answers

Compare 9/3 and 81/21

1^st number: 3 0/3, 2^nd number: 3 18/21

9/3 is smaller than 81/21

Steps for comparing fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 3 and 21 is 21
   
   Next, find the equivalent fraction of both fractional numbers with denominator 21
2. For the 1st fraction, since 3 × 7 = 21,
   9/3 = 9 × 7/3 × 7 = 63/21
3. Likewise, for the 2nd fraction, since 21 × 1 = 21,
   81/21 = 81 × 1/21 × 1 = 81/21
4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
5. 63/21 < 81/21 or 9/3 < 81/21

MathStep (Works offline)

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

Related: ¹⁸/₃ and ⁸¹/₂₁ ⁹/₆ and ⁸¹/₂₁ ⁹/₃ and ⁸¹/₄₂ ²⁷/₃ and ⁸¹/₂₁ ⁹/₃ and ⁸¹/₆₃ ⁴⁵/₃ and ⁸¹/₂₁ ⁹/₁₅ and ⁸¹/₂₁ ⁶³/₃ and ⁸¹/₂₁ ⁹/₂₁ and ⁸¹/₂₁

Compare Fractions Calculator