Compare 81/18 and 20/4
1st number: 4 9/18, 2nd number: 5 0/4
81/18 is smaller than 20/4
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 4 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 18 × 2 = 36,
81/18 = 81 × 2/18 × 2 = 162/36 - Likewise, for the 2nd fraction, since 4 × 9 = 36,
20/4 = 20 × 9/4 × 9 = 180/36 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 162/36 < 180/36 or 81/18 < 20/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/18 and 40/4 81/36 and 20/4 81/18 and 20/8 81/18 and 60/4 81/54 and 20/4 81/18 and 20/12 81/90 and 20/4 81/18 and 20/28