Compare 7/21 and 6/15
7/21 is smaller than 6/15
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
7/21 = 7 × 5/21 × 5 = 35/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
6/15 = 6 × 7/15 × 7 = 42/105 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 35/105 < 42/105 or 7/21 < 6/15
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 6/15 7/21 and 12/15 7/42 and 6/15 7/21 and 6/30 7/21 and 18/15 7/63 and 6/15 7/21 and 6/45 35/21 and 6/15 7/21 and 30/15 7/21 and 6/75 49/21 and 6/15 7/21 and 42/15