Compare 45/80 and 12/30
45/80 is greater than 12/30
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 30 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
45/80 = 45 × 3/80 × 3 = 135/240 - Likewise, for the 2nd fraction, since 30 × 8 = 240,
12/30 = 12 × 8/30 × 8 = 96/240 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 135/240 > 96/240 or 45/80 > 12/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80 and 12/30 45/80 and 24/30 45/80 and 12/60 45/80 and 36/30 45/80 and 12/90 45/80 and 60/30 45/80 and 84/30