Compare 15/12 and 63/21
1st number: 1 3/12, 2nd number: 3 0/21
15/12 is smaller than 63/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
15/12 = 15 × 7/12 × 7 = 105/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
63/21 = 63 × 4/21 × 4 = 252/84 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 105/84 < 252/84 or 15/12 < 63/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/12 and 63/21 15/24 and 63/21 15/12 and 63/42 45/12 and 63/21 15/36 and 63/21 75/12 and 63/21 15/60 and 63/21 15/84 and 63/21