Compare 21/2 and 63/80
1st number: 10 1/2, 2nd number: 63/80
21/2 is greater than 63/80
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 2 × 40 = 80,
21/2 = 21 × 40/2 × 40 = 840/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
63/80 = 63 × 1/80 × 1 = 63/80 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 840/80 > 63/80 or 21/2 > 63/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2 and 63/80 21/4 and 63/80 63/2 and 63/80 21/6 and 63/80 21/10 and 63/80 21/14 and 63/80