Compare 21/72 and 81/25
1st number: 21/72, 2nd number: 3 6/25
21/72 is smaller than 81/25
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 25 is 1800
Next, find the equivalent fraction of both fractional numbers with denominator 1800 - For the 1st fraction, since 72 × 25 = 1800,
21/72 = 21 × 25/72 × 25 = 525/1800 - Likewise, for the 2nd fraction, since 25 × 72 = 1800,
81/25 = 81 × 72/25 × 72 = 5832/1800 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 525/1800 < 5832/1800 or 21/72 < 81/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/72 and 81/25 21/72 and 81/50 63/72 and 81/25 21/72 and 81/75