Compare 12/21 and 3/8
12/21 is greater than 3/8
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
12/21 = 12 × 8/21 × 8 = 96/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
3/8 = 3 × 21/8 × 21 = 63/168 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 96/168 > 63/168 or 12/21 > 3/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21 and 3/8 12/21 and 6/8 12/42 and 3/8 12/21 and 3/16 36/21 and 3/8 12/21 and 9/8 12/63 and 3/8 12/21 and 3/24 60/21 and 3/8 12/21 and 15/8 12/21 and 3/40 84/21 and 3/8 12/21 and 21/8 12/21 and 3/56