Compare 84/21 and 15/8
1st number: 4 0/21, 2nd number: 1 7/8
84/21 is greater than 15/8
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,
84/21 = 84 × 8/21 × 8 = 672/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
15/8 = 15 × 21/8 × 21 = 315/168 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 672/168 > 315/168 or 84/21 > 15/8
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 30/8 84/42 and 15/8 84/21 and 15/16 84/21 and 45/8 84/63 and 15/8 84/21 and 15/24 84/21 and 75/8 84/21 and 15/40 84/21 and 15/56