Compare 81/6 and 45/21
1st number: 13 3/6, 2nd number: 2 3/21
81/6 is greater than 45/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
81/6 = 81 × 7/6 × 7 = 567/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
45/21 = 45 × 2/21 × 2 = 90/42 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 567/42 > 90/42 or 81/6 > 45/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/6 and 90/21 81/12 and 45/21 81/6 and 45/42 81/18 and 45/21 81/6 and 45/63 81/30 and 45/21 81/42 and 45/21