Compare 15/18 and 10/40
15/18 is greater than 10/40
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
15/18 = 15 × 20/18 × 20 = 300/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
10/40 = 10 × 9/40 × 9 = 90/360 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 300/360 > 90/360 or 15/18 > 10/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/18 and 10/40 15/18 and 20/40 15/36 and 10/40 15/18 and 10/80 45/18 and 10/40 15/18 and 30/40 15/54 and 10/40 75/18 and 10/40 15/18 and 50/40 15/90 and 10/40 15/18 and 70/40