Compare 8/63 and 21/4, Which fraction is greater?

Compare 8/63 and 21/4

1^st number: 8/63, 2^nd number: 5 1/4

8/63 is smaller than 21/4

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 4 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 63 × 4 = 252,
8/63 = 8 × 4/63 × 4 = 32/252
Likewise, for the 2nd fraction, since 4 × 63 = 252,
21/4 = 21 × 63/4 × 63 = 1323/252
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
32/252 < 1323/252 or 8/63 < 21/4

MathStep (Works offline)

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