Compare 6/21 and 18/27
6/21 is smaller than 18/27
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,
6/21 = 6 × 9/21 × 9 = 54/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
18/27 = 18 × 7/27 × 7 = 126/189 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 54/189 < 126/189 or 6/21 < 18/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21 and 18/27 6/21 and 36/27 6/42 and 18/27 6/21 and 18/54 18/21 and 18/27 6/21 and 54/27 6/63 and 18/27 6/21 and 18/81 30/21 and 18/27 6/21 and 90/27 42/21 and 18/27