Compare 7/36 and 21/81
7/36 is smaller than 21/81
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 36 × 9 = 324,
7/36 = 7 × 9/36 × 9 = 63/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
21/81 = 21 × 4/81 × 4 = 84/324 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 63/324 < 84/324 or 7/36 < 21/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/36 and 21/81 7/36 and 42/81 7/72 and 21/81 21/36 and 21/81 7/36 and 63/81 35/36 and 21/81 49/36 and 21/81