Compare 21/90 and 2/18
21/90 is greater than 2/18
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
21/90 = 21 × 1/90 × 1 = 21/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
2/18 = 2 × 5/18 × 5 = 10/90 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 21/90 > 10/90 or 21/90 > 2/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/90 and 2/18 21/90 and 4/18 21/90 and 2/36 63/90 and 2/18 21/90 and 6/18 21/90 and 2/54 21/90 and 10/18 21/90 and 2/90 21/90 and 14/18