Compare 8/21 and 42/60, Which fraction is greater?

Compare 8/21 and 42/60

8/21 is smaller than 42/60

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 21 × 20 = 420,
8/21 = 8 × 20/21 × 20 = 160/420
Likewise, for the 2nd fraction, since 60 × 7 = 420,
42/60 = 42 × 7/60 × 7 = 294/420
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
160/420 < 294/420 or 8/21 < 42/60

MathStep (Works offline)

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