Compare 30/81 and 21/63
30/81 is greater than 21/63
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 63 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 63 × 9 = 567,
21/63 = 21 × 9/63 × 9 = 189/567 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 210/567 > 189/567 or 30/81 > 21/63
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