Compare 20/21 and 1/27
20/21 is greater than 1/27
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 21 × 9 = 189,
20/21 = 20 × 9/21 × 9 = 180/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
1/27 = 1 × 7/27 × 7 = 7/189 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 180/189 > 7/189 or 20/21 > 1/27
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