Compare 6/45 and 5/21
6/45 is smaller than 5/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 21 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
6/45 = 6 × 7/45 × 7 = 42/315 - Likewise, for the 2nd fraction, since 21 × 15 = 315,
5/21 = 5 × 15/21 × 15 = 75/315 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 42/315 < 75/315 or 6/45 < 5/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/45 and 5/21 6/45 and 10/21 6/90 and 5/21 6/45 and 5/42 18/45 and 5/21 6/45 and 15/21 6/45 and 5/63 30/45 and 5/21 6/45 and 25/21 42/45 and 5/21 6/45 and 35/21