Compare 28/7 and 21/80
1st number: 4 0/7, 2nd number: 21/80
28/7 is greater than 21/80
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 7 × 80 = 560,
28/7 = 28 × 80/7 × 80 = 2240/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
21/80 = 21 × 7/80 × 7 = 147/560 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 2240/560 > 147/560 or 28/7 > 21/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/7 and 21/80 28/7 and 42/80 28/14 and 21/80 84/7 and 21/80 28/7 and 63/80 28/21 and 21/80 28/35 and 21/80 28/49 and 21/80