Compare 7/21 and 15/27
7/21 is smaller than 15/27
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 21 × 9 = 189,
7/21 = 7 × 9/21 × 9 = 63/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
15/27 = 15 × 7/27 × 7 = 105/189 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 63/189 < 105/189 or 7/21 < 15/27
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 15/27 7/21 and 30/27 7/42 and 15/27 7/21 and 15/54 7/21 and 45/27 7/63 and 15/27 7/21 and 15/81 35/21 and 15/27 7/21 and 75/27 49/21 and 15/27