Subtract 18/9 from 3/8
1st number: 3/8, 2nd number: 2 0/9
3/8 - 18/9 is -13/8.
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,
3/8 = 3 × 9/8 × 9 = 27/72 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
18/9 = 18 × 8/9 × 8 = 144/72 - Subtract the two like fractions:
27/72 - 144/72 = 27 - 144/72 = -117/72 - After reducing the fraction, the answer is -13/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/8-18/9 3/8-36/9 3/16-18/9 9/8-18/9 3/8-54/9 3/24-18/9 3/8-18/27 15/8-18/9 3/8-90/9 3/40-18/9 3/8-18/45 21/8-18/9 3/56-18/9 3/8-18/63