Subtract 27/15 from 63/18
1st number: 3 9/18, 2nd number: 1 12/15
63/18 - 27/15 is 17/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 15 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
63/18 = 63 × 5/18 × 5 = 315/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
27/15 = 27 × 6/15 × 6 = 162/90 - Subtract the two like fractions:
315/90 - 162/90 = 315 - 162/90 = 153/90 - After reducing the fraction, the answer is 17/10
- In mixed form: 17/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/18-54/15 63/36-27/15 63/18-27/30 63/18-81/15 63/54-27/15 63/18-27/45 63/90-27/15 63/18-27/75