Subtract 18/9 from 27/8
1st number: 3 3/8, 2nd number: 2 0/9
27/8 - 18/9 is 11/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 9 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
27/8 = 27 × 9/8 × 9 = 243/72 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
18/9 = 18 × 8/9 × 8 = 144/72 - Subtract the two like fractions:
243/72 - 144/72 = 243 - 144/72 = 99/72 - After reducing the fraction, the answer is 11/8
- In mixed form: 13/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/8-18/9 27/8-36/9 27/16-18/9 81/8-18/9 27/8-54/9 27/24-18/9 27/8-18/27 27/8-90/9 27/40-18/9 27/8-18/45 27/56-18/9 27/8-18/63