Subtract 15/18 from 4/8
4/8 - 15/18 is -1/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
4/8 = 4 × 9/8 × 9 = 36/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
15/18 = 15 × 4/18 × 4 = 60/72 - Subtract the two like fractions:
36/72 - 60/72 = 36 - 60/72 = -24/72 - After reducing the fraction, the answer is -1/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/8-30/18 4/16-15/18 4/8-15/36 12/8-15/18 4/8-45/18 4/24-15/18 4/8-15/54 20/8-15/18 4/8-75/18 4/40-15/18 4/8-15/90 28/8-15/18 4/56-15/18