Compare 21/15 and 18/27
1st number: 1 6/15, 2nd number: 18/27
21/15 is greater than 18/27
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 27 is 135
Next, find the equivalent fraction of both fractional numbers with denominator 135 - For the 1st fraction, since 15 × 9 = 135,
21/15 = 21 × 9/15 × 9 = 189/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
18/27 = 18 × 5/27 × 5 = 90/135 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 189/135 > 90/135 or 21/15 > 18/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15 and 18/27 21/15 and 36/27 21/30 and 18/27 21/15 and 18/54 63/15 and 18/27 21/15 and 54/27 21/45 and 18/27 21/15 and 18/81 21/15 and 90/27 21/75 and 18/27