Compare 80/12 and 21/30
1st number: 6 8/12, 2nd number: 21/30
80/12 is greater than 21/30
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
80/12 = 80 × 5/12 × 5 = 400/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
21/30 = 21 × 2/30 × 2 = 42/60 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 400/60 > 42/60 or 80/12 > 21/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/12 and 42/30 80/24 and 21/30 80/12 and 21/60 80/12 and 63/30 80/36 and 21/30 80/12 and 21/90 80/60 and 21/30 80/84 and 21/30