Compare 15/2 and 21/81
1st number: 7 1/2, 2nd number: 21/81
15/2 is greater than 21/81
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 2 × 81 = 162,
15/2 = 15 × 81/2 × 81 = 1215/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
21/81 = 21 × 2/81 × 2 = 42/162 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1215/162 > 42/162 or 15/2 > 21/81
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