Compare 20/81 and 12/28
20/81 is smaller than 12/28
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 28 is 2268
Next, find the equivalent fraction of both fractional numbers with denominator 2268 - For the 1st fraction, since 81 × 28 = 2268,
20/81 = 20 × 28/81 × 28 = 560/2268 - Likewise, for the 2nd fraction, since 28 × 81 = 2268,
12/28 = 12 × 81/28 × 81 = 972/2268 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 560/2268 < 972/2268 or 20/81 < 12/28
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