Compare 8/4 and 42/21
1st number: 2 0/4, 2nd number: 2 0/21
8/4 is equivalent to 42/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
8/4 = 8 × 21/4 × 21 = 168/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
42/21 = 42 × 4/21 × 4 = 168/84 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 168/84 = 168/84 or 8/4 = 42/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/4 and 42/21 8/4 and 84/21 24/4 and 42/21 8/12 and 42/21 8/4 and 42/63 40/4 and 42/21 8/20 and 42/21 56/4 and 42/21 8/28 and 42/21