Compare 5/21 and 63/70
5/21 is smaller than 63/70
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
5/21 = 5 × 10/21 × 10 = 50/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
63/70 = 63 × 3/70 × 3 = 189/210 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 50/210 < 189/210 or 5/21 < 63/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21 and 63/70 5/42 and 63/70 15/21 and 63/70 5/63 and 63/70 25/21 and 63/70 35/21 and 63/70