Compare 70/21 and 28/20
1st number: 3 7/21, 2nd number: 1 8/20
70/21 is greater than 28/20
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
70/21 = 70 × 20/21 × 20 = 1400/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
28/20 = 28 × 21/20 × 21 = 588/420 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1400/420 > 588/420 or 70/21 > 28/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21 and 56/20 70/42 and 28/20 70/21 and 28/40 70/21 and 84/20 70/63 and 28/20 70/21 and 28/60