Compare 1/21 and 45/9
1st number: 1/21, 2nd number: 5 0/9
1/21 is smaller than 45/9
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
1/21 = 1 × 3/21 × 3 = 3/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
45/9 = 45 × 7/9 × 7 = 315/63 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 3/63 < 315/63 or 1/21 < 45/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21 and 45/9 1/21 and 90/9 1/42 and 45/9 1/21 and 45/18 3/21 and 45/9 1/63 and 45/9 1/21 and 45/27 5/21 and 45/9 7/21 and 45/9 1/21 and 45/63