Compare 45/20 and 15/40
1st number: 2 5/20, 2nd number: 15/40
45/20 is greater than 15/40
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
45/20 = 45 × 2/20 × 2 = 90/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
15/40 = 15 × 1/40 × 1 = 15/40 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 90/40 > 15/40 or 45/20 > 15/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20 and 15/40 45/20 and 30/40 45/40 and 15/40 45/20 and 15/80 45/20 and 45/40 45/60 and 15/40 45/20 and 75/40