Compare 84/25 and 81/21
1st number: 3 9/25, 2nd number: 3 18/21
84/25 is smaller than 81/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 21 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 25 × 21 = 525,
84/25 = 84 × 21/25 × 21 = 1764/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
81/21 = 81 × 25/21 × 25 = 2025/525 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1764/525 < 2025/525 or 84/25 < 81/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/50 and 81/21 84/25 and 81/42 84/75 and 81/21 84/25 and 81/63