Compare 21/42 and 2/3
21/42 is smaller than 2/3
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 3 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
21/42 = 21 × 1/42 × 1 = 21/42 - Likewise, for the 2nd fraction, since 3 × 14 = 42,
2/3 = 2 × 14/3 × 14 = 28/42 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 21/42 < 28/42 or 21/42 < 2/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 21/42 and 4/3 21/84 and 2/3 21/42 and 2/6 63/42 and 2/3 21/42 and 6/3 21/42 and 2/9 21/42 and 10/3 21/42 and 2/15 21/42 and 14/3 21/42 and 2/21