Compare 15/4 and 21/81
1st number: 3 3/4, 2nd number: 21/81
15/4 is greater than 21/81
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 4 × 81 = 324,
15/4 = 15 × 81/4 × 81 = 1215/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
21/81 = 21 × 4/81 × 4 = 84/324 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1215/324 > 84/324 or 15/4 > 21/81
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