Compare 3/72 and 7/81
3/72 is smaller than 7/81
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 72 × 9 = 648,
3/72 = 3 × 9/72 × 9 = 27/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
7/81 = 7 × 8/81 × 8 = 56/648 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 27/648 < 56/648 or 3/72 < 7/81
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