Compare 54/21 and 70/15
1st number: 2 12/21, 2nd number: 4 10/15
54/21 is smaller than 70/15
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,
54/21 = 54 × 5/21 × 5 = 270/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
70/15 = 70 × 7/15 × 7 = 490/105 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 270/105 < 490/105 or 54/21 < 70/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/42 and 70/15 54/21 and 70/30 54/63 and 70/15 54/21 and 70/45 54/21 and 70/75