Compare 1/21 and 15/56
1/21 is smaller than 15/56
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
1/21 = 1 × 8/21 × 8 = 8/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
15/56 = 15 × 3/56 × 3 = 45/168 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 8/168 < 45/168 or 1/21 < 15/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21 and 15/56 1/21 and 30/56 1/42 and 15/56 3/21 and 15/56 1/21 and 45/56 1/63 and 15/56 5/21 and 15/56 1/21 and 75/56 7/21 and 15/56