Compare 20/72 and 28/84
20/72 is smaller than 28/84
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 84 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
20/72 = 20 × 7/72 × 7 = 140/504 - Likewise, for the 2nd fraction, since 84 × 6 = 504,
28/84 = 28 × 6/84 × 6 = 168/504 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 140/504 < 168/504 or 20/72 < 28/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/72 and 28/84 20/72 and 56/84 60/72 and 28/84