Compare 30/21 and 6/81
1st number: 1 9/21, 2nd number: 6/81
30/21 is greater than 6/81
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 21 × 27 = 567,
30/21 = 30 × 27/21 × 27 = 810/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
6/81 = 6 × 7/81 × 7 = 42/567 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 810/567 > 42/567 or 30/21 > 6/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21 and 6/81 30/21 and 12/81 30/42 and 6/81 90/21 and 6/81 30/21 and 18/81 30/63 and 6/81 30/21 and 30/81 30/21 and 42/81