Compare 81/21 and 20/25
1st number: 3 18/21, 2nd number: 20/25
81/21 is greater than 20/25
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 25 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
81/21 = 81 × 25/21 × 25 = 2025/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
20/25 = 20 × 21/25 × 21 = 420/525 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 2025/525 > 420/525 or 81/21 > 20/25
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