Compare 20/10 and 50/21
1st number: 2 0/10, 2nd number: 2 8/21
20/10 is smaller than 50/21
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,
20/10 = 20 × 21/10 × 21 = 420/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
50/21 = 50 × 10/21 × 10 = 500/210 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 420/210 < 500/210 or 20/10 < 50/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/10 and 50/21 20/10 and 50/42 60/10 and 50/21 20/30 and 50/21 20/10 and 50/63 20/50 and 50/21 20/70 and 50/21