Compare 42/18 and 15/30
1st number: 2 6/18, 2nd number: 15/30
42/18 is greater than 15/30
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
42/18 = 42 × 5/18 × 5 = 210/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
15/30 = 15 × 3/30 × 3 = 45/90 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 210/90 > 45/90 or 42/18 > 15/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18 and 15/30 42/36 and 15/30 42/18 and 15/60 42/18 and 45/30 42/54 and 15/30 42/18 and 15/90 42/18 and 75/30 42/90 and 15/30