Subtract 18/30 from 8/15
8/15 - 18/30 is -1/15.
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,
8/15 = 8 × 2/15 × 2 = 16/30 - Likewise, for the 2nd fraction, since 30 × 1 = 30,
18/30 = 18 × 1/30 × 1 = 18/30 - Subtract the two like fractions:
16/30 - 18/30 = 16 - 18/30 = -2/30 - After reducing the fraction, the answer is -1/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/15-18/30 8/15-36/30 8/30-18/30 8/15-18/60 24/15-18/30 8/15-54/30 8/45-18/30 8/15-18/90 40/15-18/30 8/15-90/30 8/75-18/30 56/15-18/30