Compare 1/81 and 6/21
1/81 is smaller than 6/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 21 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 81 × 7 = 567,
1/81 = 1 × 7/81 × 7 = 7/567 - Likewise, for the 2nd fraction, since 21 × 27 = 567,
6/21 = 6 × 27/21 × 27 = 162/567 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 7/567 < 162/567 or 1/81 < 6/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/81 and 6/21 1/81 and 12/21 1/81 and 6/42 3/81 and 6/21 1/81 and 18/21 1/81 and 6/63 5/81 and 6/21 1/81 and 30/21 7/81 and 6/21 1/81 and 42/21