Compare 8/21 and 84/80
1st number: 8/21, 2nd number: 1 4/80
8/21 is smaller than 84/80
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
8/21 = 8 × 80/21 × 80 = 640/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
84/80 = 84 × 21/80 × 21 = 1764/1680 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 640/1680 < 1764/1680 or 8/21 < 84/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/21 and 84/80 8/42 and 84/80 24/21 and 84/80 8/63 and 84/80 40/21 and 84/80 56/21 and 84/80