Compare 21/81 and 80/10
1st number: 21/81, 2nd number: 8 0/10
21/81 is smaller than 80/10
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 10 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 81 × 10 = 810,
21/81 = 21 × 10/81 × 10 = 210/810 - Likewise, for the 2nd fraction, since 10 × 81 = 810,
80/10 = 80 × 81/10 × 81 = 6480/810 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 210/810 < 6480/810 or 21/81 < 80/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/81 and 80/10 21/81 and 80/20 63/81 and 80/10 21/81 and 80/30 21/81 and 80/50 21/81 and 80/70