Compare 18/21 and 5/18
18/21 is greater than 5/18
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 21 × 6 = 126,
18/21 = 18 × 6/21 × 6 = 108/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
5/18 = 5 × 7/18 × 7 = 35/126 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 108/126 > 35/126 or 18/21 > 5/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/21 and 5/18 18/21 and 10/18 18/42 and 5/18 18/21 and 5/36 54/21 and 5/18 18/21 and 15/18 18/63 and 5/18 18/21 and 5/54 90/21 and 5/18 18/21 and 25/18 18/21 and 5/90 18/21 and 35/18