Compare 21/20 and 3/18
1st number: 1 1/20, 2nd number: 3/18
21/20 is greater than 3/18
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
21/20 = 21 × 9/20 × 9 = 189/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
3/18 = 3 × 10/18 × 10 = 30/180 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 189/180 > 30/180 or 21/20 > 3/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20 and 3/18 21/20 and 6/18 21/40 and 3/18 21/20 and 3/36 63/20 and 3/18 21/20 and 9/18 21/60 and 3/18 21/20 and 3/54 21/20 and 15/18 21/20 and 3/90 21/20 and 21/18