Subtract 18/30 from 9/18
9/18 - 18/30 is -1/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
9/18 = 9 × 5/18 × 5 = 45/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
18/30 = 18 × 3/30 × 3 = 54/90 - Subtract the two like fractions:
45/90 - 54/90 = 45 - 54/90 = -9/90 - After reducing the fraction, the answer is -1/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 9/18-36/30 9/36-18/30 9/18-18/60 27/18-18/30 9/18-54/30 9/54-18/30 9/18-18/90 45/18-18/30 9/18-90/30 9/90-18/30 63/18-18/30