Compare 20/18 and 32/21
1st number: 1 2/18, 2nd number: 1 11/21
20/18 is smaller than 32/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
20/18 = 20 × 7/18 × 7 = 140/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
32/21 = 32 × 6/21 × 6 = 192/126 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 140/126 < 192/126 or 20/18 < 32/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/18 and 32/21 20/18 and 64/21 20/36 and 32/21 20/18 and 32/42 60/18 and 32/21 20/18 and 96/21 20/54 and 32/21 20/18 and 32/63 20/90 and 32/21