Compare 50/21 and 64/90
1st number: 2 8/21, 2nd number: 64/90
50/21 is greater than 64/90
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 21 × 30 = 630,
50/21 = 50 × 30/21 × 30 = 1500/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
64/90 = 64 × 7/90 × 7 = 448/630 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1500/630 > 448/630 or 50/21 > 64/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/42 and 64/90 50/63 and 64/90