Compare 20/81 and 3/12
20/81 is smaller than 3/12
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 12 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 81 × 4 = 324,
20/81 = 20 × 4/81 × 4 = 80/324 - Likewise, for the 2nd fraction, since 12 × 27 = 324,
3/12 = 3 × 27/12 × 27 = 81/324 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 80/324 < 81/324 or 20/81 < 3/12
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