Compare 1/18 and 10/21
1/18 is smaller than 10/21
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,
1/18 = 1 × 7/18 × 7 = 7/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
10/21 = 10 × 6/21 × 6 = 60/126 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 7/126 < 60/126 or 1/18 < 10/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/18 and 10/21 1/18 and 20/21 1/36 and 10/21 1/18 and 10/42 3/18 and 10/21 1/18 and 30/21 1/54 and 10/21 1/18 and 10/63 5/18 and 10/21 1/18 and 50/21 1/90 and 10/21 7/18 and 10/21 1/18 and 70/21