Compare 21/12 and 27/21
1st number: 1 9/12, 2nd number: 1 6/21
21/12 is greater than 27/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
21/12 = 21 × 7/12 × 7 = 147/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
27/21 = 27 × 4/21 × 4 = 108/84 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 147/84 > 108/84 or 21/12 > 27/21
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