Compare 27/18 and 28/21
1st number: 1 9/18, 2nd number: 1 7/21
27/18 is greater than 28/21
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,
27/18 = 27 × 7/18 × 7 = 189/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
28/21 = 28 × 6/21 × 6 = 168/126 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 189/126 > 168/126 or 27/18 > 28/21
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