Compare 21/5 and 7/81
1st number: 4 1/5, 2nd number: 7/81
21/5 is greater than 7/81
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 5 × 81 = 405,
21/5 = 21 × 81/5 × 81 = 1701/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
7/81 = 7 × 5/81 × 5 = 35/405 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1701/405 > 35/405 or 21/5 > 7/81
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