Compare 4/21 and 90/27
1st number: 4/21, 2nd number: 3 9/27
4/21 is smaller than 90/27
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 21 × 9 = 189,
4/21 = 4 × 9/21 × 9 = 36/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
90/27 = 90 × 7/27 × 7 = 630/189 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 36/189 < 630/189 or 4/21 < 90/27
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 90/27 4/42 and 90/27 4/21 and 90/54 12/21 and 90/27 4/63 and 90/27 4/21 and 90/81 20/21 and 90/27 28/21 and 90/27