Compare 21/10 and 30/90
1st number: 2 1/10, 2nd number: 30/90
21/10 is greater than 30/90
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
21/10 = 21 × 9/10 × 9 = 189/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
30/90 = 30 × 1/90 × 1 = 30/90 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 189/90 > 30/90 or 21/10 > 30/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10 and 30/90 21/10 and 60/90 21/20 and 30/90 63/10 and 30/90 21/30 and 30/90 21/50 and 30/90 21/70 and 30/90