Compare 30/10 and 70/21
1st number: 3 0/10, 2nd number: 3 7/21
30/10 is smaller than 70/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
30/10 = 30 × 21/10 × 21 = 630/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
70/21 = 70 × 10/21 × 10 = 700/210 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 630/210 < 700/210 or 30/10 < 70/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/10 and 70/21 30/20 and 70/21 30/10 and 70/42 90/10 and 70/21 30/10 and 70/63 30/50 and 70/21 30/70 and 70/21