Compare 4/20 and 21/9
1st number: 4/20, 2nd number: 2 3/9
4/20 is smaller than 21/9
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 9 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
4/20 = 4 × 9/20 × 9 = 36/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
21/9 = 21 × 20/9 × 20 = 420/180 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 36/180 < 420/180 or 4/20 < 21/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/20 and 21/9 4/20 and 42/9 4/40 and 21/9 4/20 and 21/18 12/20 and 21/9 4/20 and 63/9 4/60 and 21/9 4/20 and 21/27 4/20 and 21/45 28/20 and 21/9 4/20 and 21/63