Compare 30/81 and 4/21
30/81 is greater than 4/21
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,
30/81 = 30 × 7/81 × 7 = 210/567 - Likewise, for the 2nd fraction, since 21 × 27 = 567,
4/21 = 4 × 27/21 × 27 = 108/567 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 210/567 > 108/567 or 30/81 > 4/21
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