Compare 12/40 and 45/80
12/40 is smaller than 45/80
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 40 × 2 = 80,
12/40 = 12 × 2/40 × 2 = 24/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
45/80 = 45 × 1/80 × 1 = 45/80 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 24/80 < 45/80 or 12/40 < 45/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/40 and 45/80 12/40 and 90/80 12/80 and 45/80 36/40 and 45/80 60/40 and 45/80 84/40 and 45/80