Compare 20/81 and 6/7
20/81 is smaller than 6/7
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 7 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 81 × 7 = 567,
20/81 = 20 × 7/81 × 7 = 140/567 - Likewise, for the 2nd fraction, since 7 × 81 = 567,
6/7 = 6 × 81/7 × 81 = 486/567 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 140/567 < 486/567 or 20/81 < 6/7
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