Compare 90/45 and 20/9
1st number: 2 0/45, 2nd number: 2 2/9
90/45 is smaller than 20/9
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 45 × 1 = 45,
90/45 = 90 × 1/45 × 1 = 90/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
20/9 = 20 × 5/9 × 5 = 100/45 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 90/45 < 100/45 or 90/45 < 20/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/45 and 40/9 90/45 and 20/18 90/45 and 60/9 90/45 and 20/27 90/45 and 20/45 90/45 and 20/63