Subtract 27/28 from 8/9
8/9 - 27/28 is -19/252.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 28 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 9 × 28 = 252,
8/9 = 8 × 28/9 × 28 = 224/252 - Likewise, for the 2nd fraction, since 28 × 9 = 252,
27/28 = 27 × 9/28 × 9 = 243/252 - Subtract the two like fractions:
224/252 - 243/252 = 224 - 243/252 = -19/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/9-27/28 8/9-54/28 8/18-27/28 8/9-27/56 24/9-27/28 8/9-81/28 8/27-27/28 8/9-27/84 40/9-27/28 8/45-27/28 56/9-27/28 8/63-27/28