Compare 18/21 and 15/27
18/21 is greater than 15/27
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,
18/21 = 18 × 9/21 × 9 = 162/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
15/27 = 15 × 7/27 × 7 = 105/189 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 162/189 > 105/189 or 18/21 > 15/27
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