Compare 6/21 and 50/72, Which fraction is greater?

Compare 6/21 and 50/72

6/21 is smaller than 50/72

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 21 × 24 = 504,
6/21 = 6 × 24/21 × 24 = 144/504
Likewise, for the 2nd fraction, since 72 × 7 = 504,
50/72 = 50 × 7/72 × 7 = 350/504
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
144/504 < 350/504 or 6/21 < 50/72

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad