Compare 21/12 and 28/72
1st number: 1 9/12, 2nd number: 28/72
21/12 is greater than 28/72
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 12 × 6 = 72,
21/12 = 21 × 6/12 × 6 = 126/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
28/72 = 28 × 1/72 × 1 = 28/72 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 126/72 > 28/72 or 21/12 > 28/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12 and 28/72 21/12 and 56/72 21/24 and 28/72 63/12 and 28/72 21/12 and 84/72 21/36 and 28/72 21/60 and 28/72 21/84 and 28/72