Subtract 28/8 from 18/27
1st number: 18/27, 2nd number: 3 4/8
18/27 - 28/8 is -17/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 8 is 216
Next, find the equivalent fraction of both fractional numbers with denominator 216 - For the 1st fraction, since 27 × 8 = 216,
18/27 = 18 × 8/27 × 8 = 144/216 - Likewise, for the 2nd fraction, since 8 × 27 = 216,
28/8 = 28 × 27/8 × 27 = 756/216 - Subtract the two like fractions:
144/216 - 756/216 = 144 - 756/216 = -612/216 - After reducing the fraction, the answer is -17/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/27-28/8 18/27-56/8 18/54-28/8 18/27-28/16 54/27-28/8 18/27-84/8 18/81-28/8 18/27-28/24 90/27-28/8 18/27-28/40 18/27-28/56