Compare 21/9 and 90/28
1st number: 2 3/9, 2nd number: 3 6/28
21/9 is smaller than 90/28
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 28 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 9 × 28 = 252,
21/9 = 21 × 28/9 × 28 = 588/252 - Likewise, for the 2nd fraction, since 28 × 9 = 252,
90/28 = 90 × 9/28 × 9 = 810/252 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 588/252 < 810/252 or 21/9 < 90/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/9 and 90/28 21/18 and 90/28 21/9 and 90/56 63/9 and 90/28 21/27 and 90/28 21/9 and 90/84 21/45 and 90/28 21/63 and 90/28