Compare 10/90 and 21/30
10/90 is smaller than 21/30
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
10/90 = 10 × 1/90 × 1 = 10/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
21/30 = 21 × 3/30 × 3 = 63/90 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 10/90 < 63/90 or 10/90 < 21/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/90 and 21/30 10/90 and 42/30 10/90 and 21/60 30/90 and 21/30 10/90 and 63/30 10/90 and 21/90 50/90 and 21/30 70/90 and 21/30