Compare 20/21 and 5/12
20/21 is greater than 5/12
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
20/21 = 20 × 4/21 × 4 = 80/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
5/12 = 5 × 7/12 × 7 = 35/84 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 80/84 > 35/84 or 20/21 > 5/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21 and 5/12 20/21 and 10/12 20/42 and 5/12 20/21 and 5/24 60/21 and 5/12 20/21 and 15/12 20/63 and 5/12 20/21 and 5/36 20/21 and 25/12 20/21 and 5/60 20/21 and 35/12 20/21 and 5/84