Subtract 27/5 from 21/12
1st number: 1 9/12, 2nd number: 5 2/5
21/12 - 27/5 is -73/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 5 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60 - Likewise, for the 2nd fraction, since 5 × 12 = 60,
27/5 = 27 × 12/5 × 12 = 324/60 - Subtract the two like fractions:
105/60 - 324/60 = 105 - 324/60 = -219/60 - After reducing the fraction, the answer is -73/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12-27/5 21/12-54/5 21/24-27/5 21/12-27/10 63/12-27/5 21/12-81/5 21/36-27/5 21/12-27/15 21/60-27/5 21/12-27/25 21/84-27/5 21/12-27/35