Subtract 6/8 from 9/18
9/18 - 6/8 is -1/4.
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,
9/18 = 9 × 4/18 × 4 = 36/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
6/8 = 6 × 9/8 × 9 = 54/72 - Subtract the two like fractions:
36/72 - 54/72 = 36 - 54/72 = -18/72 - After reducing the fraction, the answer is -1/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 9/18-12/8 9/36-6/8 9/18-6/16 27/18-6/8 9/18-18/8 9/54-6/8 9/18-6/24 45/18-6/8 9/18-30/8 9/90-6/8 9/18-6/40 63/18-6/8 9/18-42/8 9/18-6/56