Compare 42/81 and 1/21
42/81 is greater than 1/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 21 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 81 × 7 = 567,
42/81 = 42 × 7/81 × 7 = 294/567 - Likewise, for the 2nd fraction, since 21 × 27 = 567,
1/21 = 1 × 27/21 × 27 = 27/567 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 294/567 > 27/567 or 42/81 > 1/21
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