Compare 84/21 and 42/10
1st number: 4 0/21, 2nd number: 4 2/10
84/21 is smaller than 42/10
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
84/21 = 84 × 10/21 × 10 = 840/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
42/10 = 42 × 21/10 × 21 = 882/210 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 840/210 < 882/210 or 84/21 < 42/10
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 84/10 84/42 and 42/10 84/21 and 42/20 84/63 and 42/10 84/21 and 42/30 84/21 and 42/50 84/21 and 42/70