Answers

Compare 90/9 and 81/7

1^st number: 10 0/9, 2^nd number: 11 4/7

90/9 is smaller than 81/7

Steps for comparing fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 9 and 7 is 63
   
   Next, find the equivalent fraction of both fractional numbers with denominator 63
2. For the 1st fraction, since 9 × 7 = 63,
   90/9 = 90 × 7/9 × 7 = 630/63
3. Likewise, for the 2nd fraction, since 7 × 9 = 63,
   81/7 = 81 × 9/7 × 9 = 729/63
4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
5. 630/63 < 729/63 or 90/9 < 81/7

MathStep (Works offline)

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

Related: ⁹⁰/₁₈ and ⁸¹/₇ ⁹⁰/₉ and ⁸¹/₁₄ ⁹⁰/₂₇ and ⁸¹/₇ ⁹⁰/₉ and ⁸¹/₂₁ ⁹⁰/₄₅ and ⁸¹/₇ ⁹⁰/₉ and ⁸¹/₃₅ ⁹⁰/₆₃ and ⁸¹/₇ ⁹⁰/₉ and ⁸¹/₄₉

Compare Fractions Calculator