Compare 15/21 and 2/18
15/21 is greater than 2/18
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,
15/21 = 15 × 6/21 × 6 = 90/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
2/18 = 2 × 7/18 × 7 = 14/126 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 90/126 > 14/126 or 15/21 > 2/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21 and 2/18 15/21 and 4/18 15/42 and 2/18 15/21 and 2/36 45/21 and 2/18 15/21 and 6/18 15/63 and 2/18 15/21 and 2/54 75/21 and 2/18 15/21 and 10/18 15/21 and 2/90 15/21 and 14/18