Compare 18/70 and 45/80
18/70 is smaller than 45/80
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 70 × 8 = 560,
18/70 = 18 × 8/70 × 8 = 144/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
45/80 = 45 × 7/80 × 7 = 315/560 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 144/560 < 315/560 or 18/70 < 45/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/70 and 45/80 18/70 and 90/80 54/70 and 45/80 90/70 and 45/80