Compare 6/45 and 21/81
6/45 is smaller than 21/81
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 45 × 9 = 405,
6/45 = 6 × 9/45 × 9 = 54/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
21/81 = 21 × 5/81 × 5 = 105/405 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 54/405 < 105/405 or 6/45 < 21/81
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