Compare 15/21 and 84/9
1st number: 15/21, 2nd number: 9 3/9
15/21 is smaller than 84/9
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,
15/21 = 15 × 3/21 × 3 = 45/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
84/9 = 84 × 7/9 × 7 = 588/63 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 45/63 < 588/63 or 15/21 < 84/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21 and 84/9 15/42 and 84/9 15/21 and 84/18 45/21 and 84/9 15/63 and 84/9 15/21 and 84/27 75/21 and 84/9 15/21 and 84/45 15/21 and 84/63