Compare 21/6 and 42/81
1st number: 3 3/6, 2nd number: 42/81
21/6 is greater than 42/81
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 6 × 27 = 162,
21/6 = 21 × 27/6 × 27 = 567/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
42/81 = 42 × 2/81 × 2 = 84/162 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 567/162 > 84/162 or 21/6 > 42/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6 and 42/81 21/6 and 84/81 21/12 and 42/81 63/6 and 42/81 21/18 and 42/81 21/30 and 42/81 21/42 and 42/81