Compare 45/21 and 63/8
1st number: 2 3/21, 2nd number: 7 7/8
45/21 is smaller than 63/8
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
45/21 = 45 × 8/21 × 8 = 360/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
63/8 = 63 × 21/8 × 21 = 1323/168 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 360/168 < 1323/168 or 45/21 < 63/8
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 63/8 45/42 and 63/8 45/21 and 63/16 45/63 and 63/8 45/21 and 63/24 45/21 and 63/40 45/21 and 63/56