Compare 9/54 and 15/21
9/54 is smaller than 15/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 21 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
9/54 = 9 × 7/54 × 7 = 63/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
15/21 = 15 × 18/21 × 18 = 270/378 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 63/378 < 270/378 or 9/54 < 15/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/54 and 15/21 9/54 and 30/21 9/54 and 15/42 27/54 and 15/21 9/54 and 45/21 9/54 and 15/63 45/54 and 15/21 9/54 and 75/21 63/54 and 15/21