Compare 21/56 and 7/21
21/56 is greater than 7/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 56 × 3 = 168,
21/56 = 21 × 3/56 × 3 = 63/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
7/21 = 7 × 8/21 × 8 = 56/168 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 63/168 > 56/168 or 21/56 > 7/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/56 and 7/21 21/56 and 14/21 21/56 and 7/42 63/56 and 7/21 21/56 and 7/63 21/56 and 35/21 21/56 and 49/21