Compare 21/4 and 5/80
1st number: 5 1/4, 2nd number: 5/80
21/4 is greater than 5/80
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 4 × 20 = 80,
21/4 = 21 × 20/4 × 20 = 420/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
5/80 = 5 × 1/80 × 1 = 5/80 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 420/80 > 5/80 or 21/4 > 5/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4 and 5/80 21/4 and 10/80 21/8 and 5/80 63/4 and 5/80 21/4 and 15/80 21/12 and 5/80 21/4 and 25/80 21/20 and 5/80 21/4 and 35/80 21/28 and 5/80