Compare 80/30 and 21/12
1st number: 2 20/30, 2nd number: 1 9/12
80/30 is greater than 21/12
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
80/30 = 80 × 2/30 × 2 = 160/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 160/60 > 105/60 or 80/30 > 21/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/30 and 42/12 80/60 and 21/12 80/30 and 21/24 80/30 and 63/12 80/90 and 21/12 80/30 and 21/36 80/30 and 21/60 80/30 and 21/84