Compare 7/8 and 21/81
7/8 is greater than 21/81
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 8 × 81 = 648,
7/8 = 7 × 81/8 × 81 = 567/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
21/81 = 21 × 8/81 × 8 = 168/648 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 567/648 > 168/648 or 7/8 > 21/81
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