Compare 4/21 and 21/54
4/21 is smaller than 21/54
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
4/21 = 4 × 18/21 × 18 = 72/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
21/54 = 21 × 7/54 × 7 = 147/378 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 72/378 < 147/378 or 4/21 < 21/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21 and 21/54 4/21 and 42/54 4/42 and 21/54 12/21 and 21/54 4/21 and 63/54 4/63 and 21/54 20/21 and 21/54 28/21 and 21/54