Compare 12/21 and 1/30
12/21 is greater than 1/30
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
12/21 = 12 × 10/21 × 10 = 120/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
1/30 = 1 × 7/30 × 7 = 7/210 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 120/210 > 7/210 or 12/21 > 1/30
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 1/30 12/21 and 2/30 12/42 and 1/30 12/21 and 1/60 36/21 and 1/30 12/21 and 3/30 12/63 and 1/30 12/21 and 1/90 60/21 and 1/30 12/21 and 5/30 84/21 and 1/30 12/21 and 7/30