Compare 81/10 and 7/21
1st number: 8 1/10, 2nd number: 7/21
81/10 is greater than 7/21
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,
81/10 = 81 × 21/10 × 21 = 1701/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
7/21 = 7 × 10/21 × 10 = 70/210 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1701/210 > 70/210 or 81/10 > 7/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/10 and 14/21 81/20 and 7/21 81/10 and 7/42 81/30 and 7/21 81/10 and 7/63 81/10 and 35/21 81/50 and 7/21 81/10 and 49/21 81/70 and 7/21