Compare 8/21 and 12/81
8/21 is greater than 12/81
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,
8/21 = 8 × 27/21 × 27 = 216/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
12/81 = 12 × 7/81 × 7 = 84/567 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 216/567 > 84/567 or 8/21 > 12/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/21 and 12/81 8/21 and 24/81 8/42 and 12/81 24/21 and 12/81 8/21 and 36/81 8/63 and 12/81 40/21 and 12/81 8/21 and 60/81 56/21 and 12/81 8/21 and 84/81