Subtract 63/12 from 27/18
1st number: 1 9/18, 2nd number: 5 3/12
27/18 - 63/12 is -15/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 12 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 18 × 2 = 36,
27/18 = 27 × 2/18 × 2 = 54/36 - Likewise, for the 2nd fraction, since 12 × 3 = 36,
63/12 = 63 × 3/12 × 3 = 189/36 - Subtract the two like fractions:
54/36 - 189/36 = 54 - 189/36 = -135/36 - After reducing the fraction, the answer is -15/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/18-63/12 27/36-63/12 27/18-63/24 81/18-63/12 27/54-63/12 27/18-63/36 27/90-63/12 27/18-63/60 27/18-63/84