Compare 42/21 and 5/8
1st number: 2 0/21, 2nd number: 5/8
42/21 is greater than 5/8
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,
42/21 = 42 × 8/21 × 8 = 336/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
5/8 = 5 × 21/8 × 21 = 105/168 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 336/168 > 105/168 or 42/21 > 5/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21 and 5/8 42/21 and 10/8 42/21 and 5/16 42/21 and 15/8 42/63 and 5/8 42/21 and 5/24 42/21 and 25/8 42/21 and 5/40 42/21 and 35/8 42/21 and 5/56