Compare 15/80 and 3/81
15/80 is greater than 3/81
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 81 is 6480
Next, find the equivalent fraction of both fractional numbers with denominator 6480 - For the 1st fraction, since 80 × 81 = 6480,
15/80 = 15 × 81/80 × 81 = 1215/6480 - Likewise, for the 2nd fraction, since 81 × 80 = 6480,
3/81 = 3 × 80/81 × 80 = 240/6480 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1215/6480 > 240/6480 or 15/80 > 3/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/80 and 3/81 15/80 and 6/81 45/80 and 3/81 15/80 and 9/81 75/80 and 3/81 15/80 and 15/81 15/80 and 21/81