Subtract 15/5 from 18/15
1st number: 1 3/15, 2nd number: 3 0/5
18/15 - 15/5 is -9/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 5 is 15
Next, find the equivalent fraction of both fractional numbers with denominator 15 - For the 1st fraction, since 15 × 1 = 15,
18/15 = 18 × 1/15 × 1 = 18/15 - Likewise, for the 2nd fraction, since 5 × 3 = 15,
15/5 = 15 × 3/5 × 3 = 45/15 - Subtract the two like fractions:
18/15 - 45/15 = 18 - 45/15 = -27/15 - After reducing the fraction, the answer is -9/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/15-15/5 18/15-30/5 18/30-15/5 18/15-15/10 54/15-15/5 18/15-45/5 18/45-15/5 90/15-15/5 18/15-75/5 18/75-15/5 18/15-15/25 18/15-15/35