Compare 4/21 and 20/25
4/21 is smaller 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,
4/21 = 4 × 25/21 × 25 = 100/525 - 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
- 100/525 < 420/525 or 4/21 < 20/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21 and 20/25 4/21 and 40/25 4/42 and 20/25 4/21 and 20/50 12/21 and 20/25 4/21 and 60/25 4/63 and 20/25 4/21 and 20/75 20/21 and 20/25 28/21 and 20/25