Compare 45/40 and 20/18
1st number: 1 5/40, 2nd number: 1 2/18
45/40 is greater than 20/18
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 18 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
45/40 = 45 × 9/40 × 9 = 405/360 - Likewise, for the 2nd fraction, since 18 × 20 = 360,
20/18 = 20 × 20/18 × 20 = 400/360 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 405/360 > 400/360 or 45/40 > 20/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/40 and 20/18 45/40 and 40/18 45/80 and 20/18 45/40 and 20/36 45/40 and 60/18 45/40 and 20/54 45/40 and 20/90