Compare 15/18 and 27/21
1st number: 15/18, 2nd number: 1 6/21
15/18 is smaller than 27/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
15/18 = 15 × 7/18 × 7 = 105/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
27/21 = 27 × 6/21 × 6 = 162/126 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 105/126 < 162/126 or 15/18 < 27/21
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