Compare 21/5 and 90/70
1st number: 4 1/5, 2nd number: 1 20/70
21/5 is greater than 90/70
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 5 × 14 = 70,
21/5 = 21 × 14/5 × 14 = 294/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
90/70 = 90 × 1/70 × 1 = 90/70 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 294/70 > 90/70 or 21/5 > 90/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/5 and 90/70 21/10 and 90/70 63/5 and 90/70 21/15 and 90/70 21/25 and 90/70 21/35 and 90/70