Compare 18/81 and 5/8
18/81 is smaller than 5/8
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 8 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 81 × 8 = 648,
18/81 = 18 × 8/81 × 8 = 144/648 - Likewise, for the 2nd fraction, since 8 × 81 = 648,
5/8 = 5 × 81/8 × 81 = 405/648 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 144/648 < 405/648 or 18/81 < 5/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/81 and 5/8 18/81 and 10/8 18/81 and 5/16 54/81 and 5/8 18/81 and 15/8 18/81 and 5/24 90/81 and 5/8 18/81 and 25/8 18/81 and 5/40 18/81 and 35/8 18/81 and 5/56