Subtract 25/8 from 27/18
1st number: 1 9/18, 2nd number: 3 1/8
27/18 - 25/8 is -13/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
27/18 = 27 × 4/18 × 4 = 108/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
25/8 = 25 × 9/8 × 9 = 225/72 - Subtract the two like fractions:
108/72 - 225/72 = 108 - 225/72 = -117/72 - After reducing the fraction, the answer is -13/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/18-25/8 27/18-50/8 27/36-25/8 27/18-25/16 81/18-25/8 27/18-75/8 27/54-25/8 27/18-25/24 27/90-25/8 27/18-25/40 27/18-25/56