Compare 81/30 and 1/7, Which fraction is greater?

Compare 81/30 and 1/7

1^st number: 2 21/30, 2^nd number: 1/7

81/30 is greater than 1/7

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 7 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 30 × 7 = 210,
81/30 = 81 × 7/30 × 7 = 567/210
Likewise, for the 2nd fraction, since 7 × 30 = 210,
1/7 = 1 × 30/7 × 30 = 30/210
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
567/210 > 30/210 or 81/30 > 1/7

MathStep (Works offline)

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