Compare 21/8 and 27/21
1st number: 2 5/8, 2nd number: 1 6/21
21/8 is greater than 27/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
21/8 = 21 × 21/8 × 21 = 441/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
27/21 = 27 × 8/21 × 8 = 216/168 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 441/168 > 216/168 or 21/8 > 27/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/8 and 27/21 21/8 and 54/21 21/16 and 27/21 21/8 and 27/42 63/8 and 27/21 21/8 and 81/21 21/24 and 27/21 21/8 and 27/63 21/40 and 27/21 21/56 and 27/21