Compare 12/18 and 6/21
12/18 is greater than 6/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
12/18 = 12 × 7/18 × 7 = 84/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
6/21 = 6 × 6/21 × 6 = 36/126 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 84/126 > 36/126 or 12/18 > 6/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/18 and 6/21 12/18 and 12/21 12/36 and 6/21 12/18 and 6/42 36/18 and 6/21 12/18 and 18/21 12/54 and 6/21 12/18 and 6/63 60/18 and 6/21 12/18 and 30/21 12/90 and 6/21 84/18 and 6/21 12/18 and 42/21