Compare 4/80 and 21/12
1st number: 4/80, 2nd number: 1 9/12
4/80 is smaller than 21/12
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 12 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
4/80 = 4 × 3/80 × 3 = 12/240 - Likewise, for the 2nd fraction, since 12 × 20 = 240,
21/12 = 21 × 20/12 × 20 = 420/240 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 12/240 < 420/240 or 4/80 < 21/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/80 and 21/12 4/80 and 42/12 4/80 and 21/24 12/80 and 21/12 4/80 and 63/12 4/80 and 21/36 20/80 and 21/12 4/80 and 21/60 28/80 and 21/12 4/80 and 21/84