Compare 84/81 and 56/21
1st number: 1 3/81, 2nd number: 2 14/21
84/81 is smaller than 56/21
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,
84/81 = 84 × 7/81 × 7 = 588/567 - Likewise, for the 2nd fraction, since 21 × 27 = 567,
56/21 = 56 × 27/21 × 27 = 1512/567 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 588/567 < 1512/567 or 84/81 < 56/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/81 and 56/42 84/81 and 56/63