Compare 30/45 and 21/9
1st number: 30/45, 2nd number: 2 3/9
30/45 is smaller than 21/9
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 45 × 1 = 45,
30/45 = 30 × 1/45 × 1 = 30/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
21/9 = 21 × 5/9 × 5 = 105/45 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 30/45 < 105/45 or 30/45 < 21/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/45 and 21/9 30/45 and 42/9 30/90 and 21/9 30/45 and 21/18 90/45 and 21/9 30/45 and 63/9 30/45 and 21/27 30/45 and 21/45 30/45 and 21/63