Subtract 18/30 from 7/15
7/15 - 18/30 is -2/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 30 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 15 × 2 = 30,
7/15 = 7 × 2/15 × 2 = 14/30 - Likewise, for the 2nd fraction, since 30 × 1 = 30,
18/30 = 18 × 1/30 × 1 = 18/30 - Subtract the two like fractions:
14/30 - 18/30 = 14 - 18/30 = -4/30 - After reducing the fraction, the answer is -2/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/15-18/30 7/15-36/30 7/30-18/30 7/15-18/60 21/15-18/30 7/15-54/30 7/45-18/30 7/15-18/90 35/15-18/30 7/15-90/30 7/75-18/30 49/15-18/30