Compare 70/9 and 50/21
1st number: 7 7/9, 2nd number: 2 8/21
70/9 is greater than 50/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
70/9 = 70 × 7/9 × 7 = 490/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
50/21 = 50 × 3/21 × 3 = 150/63 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 490/63 > 150/63 or 70/9 > 50/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/18 and 50/21 70/9 and 50/42 70/27 and 50/21 70/9 and 50/63 70/45 and 50/21 70/63 and 50/21