Compare 7/21 and 2/12
7/21 is greater than 2/12
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
7/21 = 7 × 4/21 × 4 = 28/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
2/12 = 2 × 7/12 × 7 = 14/84 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 28/84 > 14/84 or 7/21 > 2/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/21 and 2/12 7/21 and 4/12 7/42 and 2/12 7/21 and 2/24 7/21 and 6/12 7/63 and 2/12 7/21 and 2/36 35/21 and 2/12 7/21 and 10/12 7/21 and 2/60 49/21 and 2/12 7/21 and 14/12 7/21 and 2/84