Compare 12/8 and 40/81, Which fraction is greater?

Compare 12/8 and 40/81

1^st number: 1 4/8, 2^nd number: 40/81

12/8 is greater than 40/81

Find the least common denominator or LCM of the two denominators:
LCM of 8 and 81 is 648

Next, find the equivalent fraction of both fractional numbers with denominator 648
For the 1st fraction, since 8 × 81 = 648,
12/8 = 12 × 81/8 × 81 = 972/648
Likewise, for the 2nd fraction, since 81 × 8 = 648,
40/81 = 40 × 8/81 × 8 = 320/648
Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
972/648 > 320/648 or 12/8 > 40/81

MathStep (Works offline)

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