Subtract 27/15 from 45/12
1st number: 3 9/12, 2nd number: 1 12/15
45/12 - 27/15 is 39/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
45/12 = 45 × 5/12 × 5 = 225/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
27/15 = 27 × 4/15 × 4 = 108/60 - Subtract the two like fractions:
225/60 - 108/60 = 225 - 108/60 = 117/60 - After reducing the fraction, the answer is 39/20
- In mixed form: 119/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12-27/15 45/12-54/15 45/24-27/15 45/12-27/30 45/12-81/15 45/36-27/15 45/12-27/45 45/60-27/15 45/12-27/75 45/84-27/15