Compare 45/21 and 45/72
1st number: 2 3/21, 2nd number: 45/72
45/21 is greater than 45/72
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,
45/21 = 45 × 24/21 × 24 = 1080/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
45/72 = 45 × 7/72 × 7 = 315/504 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1080/504 > 315/504 or 45/21 > 45/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21 and 45/72 45/21 and 90/72 45/42 and 45/72 45/63 and 45/72