Compare 70/21 and 45/15
1st number: 3 7/21, 2nd number: 3 0/15
70/21 is greater than 45/15
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
70/21 = 70 × 5/21 × 5 = 350/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
45/15 = 45 × 7/15 × 7 = 315/105 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 350/105 > 315/105 or 70/21 > 45/15
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 90/15 70/42 and 45/15 70/21 and 45/30 70/63 and 45/15 70/21 and 45/75