Subtract 6/15 from 3/18
3/18 - 6/15 is -7/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 15 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
3/18 = 3 × 5/18 × 5 = 15/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
6/15 = 6 × 6/15 × 6 = 36/90 - Subtract the two like fractions:
15/90 - 36/90 = 15 - 36/90 = -21/90 - After reducing the fraction, the answer is -7/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/18-6/15 3/18-12/15 3/36-6/15 3/18-6/30 9/18-6/15 3/18-18/15 3/54-6/15 3/18-6/45 15/18-6/15 3/18-30/15 3/90-6/15 3/18-6/75 21/18-6/15 3/18-42/15