Compare 9/28 and 5/21
9/28 is greater than 5/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
9/28 = 9 × 3/28 × 3 = 27/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
5/21 = 5 × 4/21 × 4 = 20/84 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 27/84 > 20/84 or 9/28 > 5/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/28 and 5/21 9/28 and 10/21 9/56 and 5/21 9/28 and 5/42 27/28 and 5/21 9/28 and 15/21 9/84 and 5/21 9/28 and 5/63 45/28 and 5/21 9/28 and 25/21 63/28 and 5/21 9/28 and 35/21