Compare 21/63 and 20/28
21/63 is smaller than 20/28
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 28 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 63 × 4 = 252,
21/63 = 21 × 4/63 × 4 = 84/252 - Likewise, for the 2nd fraction, since 28 × 9 = 252,
20/28 = 20 × 9/28 × 9 = 180/252 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 84/252 < 180/252 or 21/63 < 20/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/63 and 20/28 21/63 and 40/28 21/63 and 20/56 21/63 and 60/28 21/63 and 20/84