Compare 30/7 and 21/30
1st number: 4 2/7, 2nd number: 21/30
30/7 is greater than 21/30
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 7 × 30 = 210,
30/7 = 30 × 30/7 × 30 = 900/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
21/30 = 21 × 7/30 × 7 = 147/210 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 900/210 > 147/210 or 30/7 > 21/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/7 and 21/30 30/7 and 42/30 30/14 and 21/30 30/7 and 21/60 90/7 and 21/30 30/7 and 63/30 30/21 and 21/30 30/7 and 21/90 30/35 and 21/30 30/49 and 21/30