Compare 20/21 and 7/10
20/21 is greater than 7/10
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
20/21 = 20 × 10/21 × 10 = 200/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
7/10 = 7 × 21/10 × 21 = 147/210 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 200/210 > 147/210 or 20/21 > 7/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21 and 7/10 20/21 and 14/10 20/42 and 7/10 20/21 and 7/20 60/21 and 7/10 20/21 and 21/10 20/63 and 7/10 20/21 and 7/30 20/21 and 35/10 20/21 and 7/50 20/21 and 49/10 20/21 and 7/70