Compare 4/21 and 1/9
4/21 is greater than 1/9
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
4/21 = 4 × 3/21 × 3 = 12/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
1/9 = 1 × 7/9 × 7 = 7/63 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 12/63 > 7/63 or 4/21 > 1/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21 and 1/9 4/21 and 2/9 4/42 and 1/9 4/21 and 1/18 12/21 and 1/9 4/21 and 3/9 4/63 and 1/9 4/21 and 1/27 20/21 and 1/9 4/21 and 5/9 4/21 and 1/45 28/21 and 1/9 4/21 and 7/9 4/21 and 1/63