Compare 81/21 and 6/7
1st number: 3 18/21, 2nd number: 6/7
81/21 is greater than 6/7
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 21 × 1 = 21,
81/21 = 81 × 1/21 × 1 = 81/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
6/7 = 6 × 3/7 × 3 = 18/21 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 81/21 > 18/21 or 81/21 > 6/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/21 and 12/7 81/42 and 6/7 81/21 and 6/14 81/21 and 18/7 81/63 and 6/7 81/21 and 6/21 81/21 and 30/7 81/21 and 6/35 81/21 and 42/7 81/21 and 6/49