Compare 81/21 and 2/9
1st number: 3 18/21, 2nd number: 2/9
81/21 is greater than 2/9
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
81/21 = 81 × 3/21 × 3 = 243/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
2/9 = 2 × 7/9 × 7 = 14/63 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 243/63 > 14/63 or 81/21 > 2/9
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 4/9 81/42 and 2/9 81/21 and 2/18 81/21 and 6/9 81/63 and 2/9 81/21 and 2/27 81/21 and 10/9 81/21 and 2/45 81/21 and 14/9 81/21 and 2/63