Compare 45/70 and 12/30
45/70 is greater than 12/30
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
45/70 = 45 × 3/70 × 3 = 135/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
12/30 = 12 × 7/30 × 7 = 84/210 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 135/210 > 84/210 or 45/70 > 12/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70 and 12/30 45/70 and 24/30 45/70 and 12/60 45/70 and 36/30 45/70 and 12/90 45/70 and 60/30 45/70 and 84/30