Compare 21/4 and 6/81
1st number: 5 1/4, 2nd number: 6/81
21/4 is greater than 6/81
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 4 × 81 = 324,
21/4 = 21 × 81/4 × 81 = 1701/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
6/81 = 6 × 4/81 × 4 = 24/324 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1701/324 > 24/324 or 21/4 > 6/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4 and 6/81 21/4 and 12/81 21/8 and 6/81 63/4 and 6/81 21/4 and 18/81 21/12 and 6/81 21/4 and 30/81 21/20 and 6/81 21/4 and 42/81 21/28 and 6/81