Subtract 28/16 from 8/18
1st number: 8/18, 2nd number: 1 12/16
8/18 - 28/16 is -47/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 16 is 144
Next, find the equivalent fraction of both fractional numbers with denominator 144 - For the 1st fraction, since 18 × 8 = 144,
8/18 = 8 × 8/18 × 8 = 64/144 - Likewise, for the 2nd fraction, since 16 × 9 = 144,
28/16 = 28 × 9/16 × 9 = 252/144 - Subtract the two like fractions:
64/144 - 252/144 = 64 - 252/144 = -188/144 - After reducing the fraction, the answer is -47/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/18-28/16 8/18-56/16 8/36-28/16 8/18-28/32 24/18-28/16 8/18-84/16 8/54-28/16 8/18-28/48 40/18-28/16 8/90-28/16 8/18-28/80 56/18-28/16