Compare 4/21 and 25/81
4/21 is smaller than 25/81
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 21 × 27 = 567,
4/21 = 4 × 27/21 × 27 = 108/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
25/81 = 25 × 7/81 × 7 = 175/567 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 108/567 < 175/567 or 4/21 < 25/81
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 25/81 4/21 and 50/81 4/42 and 25/81 12/21 and 25/81 4/21 and 75/81 4/63 and 25/81 20/21 and 25/81 28/21 and 25/81