Compare 30/90 and 18/15
1st number: 30/90, 2nd number: 1 3/15
30/90 is smaller than 18/15
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 15 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
30/90 = 30 × 1/90 × 1 = 30/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
18/15 = 18 × 6/15 × 6 = 108/90 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 30/90 < 108/90 or 30/90 < 18/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/90 and 18/15 30/90 and 36/15 30/90 and 18/30 30/90 and 54/15 30/90 and 18/45 30/90 and 90/15 30/90 and 18/75