Compare 18/21 and 5/10
18/21 is greater than 5/10
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
18/21 = 18 × 10/21 × 10 = 180/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
5/10 = 5 × 21/10 × 21 = 105/210 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 180/210 > 105/210 or 18/21 > 5/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/21 and 5/10 18/42 and 5/10 18/21 and 5/20 54/21 and 5/10 18/21 and 15/10 18/63 and 5/10 18/21 and 5/30 90/21 and 5/10 18/21 and 25/10 18/21 and 5/50 18/21 and 35/10 18/21 and 5/70