Compare 1/10 and 18/21
1/10 is smaller than 18/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
1/10 = 1 × 21/10 × 21 = 21/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
18/21 = 18 × 10/21 × 10 = 180/210 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 21/210 < 180/210 or 1/10 < 18/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/10 and 18/21 1/10 and 36/21 1/20 and 18/21 1/10 and 18/42 3/10 and 18/21 1/10 and 54/21 1/30 and 18/21 1/10 and 18/63 5/10 and 18/21 1/10 and 90/21 1/50 and 18/21 7/10 and 18/21 1/70 and 18/21