Subtract 54/21 from 15/6
1st number: 2 3/6, 2nd number: 2 12/21
15/6 - 54/21 is -1/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
15/6 = 15 × 7/6 × 7 = 105/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
54/21 = 54 × 2/21 × 2 = 108/42 - Subtract the two like fractions:
105/42 - 108/42 = 105 - 108/42 = -3/42 - After reducing the fraction, the answer is -1/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/6-54/21 15/12-54/21 15/6-54/42 45/6-54/21 15/18-54/21 15/6-54/63 75/6-54/21 15/30-54/21 15/42-54/21