Subtract 15/14 from 54/21
1st number: 2 12/21, 2nd number: 1 1/14
54/21 - 15/14 is 3/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
54/21 = 54 × 2/21 × 2 = 108/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
15/14 = 15 × 3/14 × 3 = 45/42 - Subtract the two like fractions:
108/42 - 45/42 = 108 - 45/42 = 63/42 - After reducing the fraction, the answer is 3/2
- In mixed form: 11/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21-30/14 54/42-15/14 54/21-15/28 54/21-45/14 54/63-15/14 54/21-15/42 54/21-75/14 54/21-15/70 54/21-15/98