Compare 45/21 and 63/28
1st number: 2 3/21, 2nd number: 2 7/28
45/21 is smaller than 63/28
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
45/21 = 45 × 4/21 × 4 = 180/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
63/28 = 63 × 3/28 × 3 = 189/84 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 180/84 < 189/84 or 45/21 < 63/28
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 63/28 45/42 and 63/28 45/21 and 63/56 45/63 and 63/28 45/21 and 63/84