Compare 21/12 and 63/20
1st number: 1 9/12, 2nd number: 3 3/20
21/12 is smaller than 63/20
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
63/20 = 63 × 3/20 × 3 = 189/60 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 105/60 < 189/60 or 21/12 < 63/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12 and 63/20 21/24 and 63/20 21/12 and 63/40 63/12 and 63/20 21/36 and 63/20 21/12 and 63/60 21/60 and 63/20 21/84 and 63/20