Compare 18/5 and 90/20
1st number: 3 3/5, 2nd number: 4 10/20
18/5 is smaller than 90/20
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 5 × 4 = 20,
18/5 = 18 × 4/5 × 4 = 72/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
90/20 = 90 × 1/20 × 1 = 90/20 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 72/20 < 90/20 or 18/5 < 90/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/5 and 90/20 18/10 and 90/20 18/5 and 90/40 54/5 and 90/20 18/15 and 90/20 18/5 and 90/60 90/5 and 90/20 18/25 and 90/20 18/35 and 90/20