Compare 3/18 and 21/70
3/18 is smaller than 21/70
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 18 × 35 = 630,
3/18 = 3 × 35/18 × 35 = 105/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
21/70 = 21 × 9/70 × 9 = 189/630 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 105/630 < 189/630 or 3/18 < 21/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/18 and 21/70 3/18 and 42/70 3/36 and 21/70 9/18 and 21/70 3/18 and 63/70 3/54 and 21/70 15/18 and 21/70 3/90 and 21/70 21/18 and 21/70