Compare 30/21 and 5/18
1st number: 1 9/21, 2nd number: 5/18
30/21 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,
30/21 = 30 × 6/21 × 6 = 180/126 - 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
- 180/126 > 35/126 or 30/21 > 5/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21 and 5/18 30/21 and 10/18 30/42 and 5/18 30/21 and 5/36 90/21 and 5/18 30/21 and 15/18 30/63 and 5/18 30/21 and 5/54 30/21 and 25/18 30/21 and 5/90 30/21 and 35/18