Compare 30/45 and 12/18
30/45 is equivalent to 12/18
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
30/45 = 30 × 2/45 × 2 = 60/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
12/18 = 12 × 5/18 × 5 = 60/90 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 60/90 = 60/90 or 30/45 = 12/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/45 and 12/18 30/45 and 24/18 30/90 and 12/18 30/45 and 12/36 90/45 and 12/18 30/45 and 36/18 30/45 and 12/54 30/45 and 60/18 30/45 and 12/90 30/45 and 84/18