Subtract 10/15 from 15/30
15/30 - 10/15 is -1/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
15/30 = 15 × 1/30 × 1 = 15/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
10/15 = 10 × 2/15 × 2 = 20/30 - Subtract the two like fractions:
15/30 - 20/30 = 15 - 20/30 = -5/30 - After reducing the fraction, the answer is -1/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/30-20/15 15/60-10/15 15/30-10/30 45/30-10/15 15/30-30/15 15/90-10/15 15/30-10/45 75/30-10/15 15/30-50/15 15/30-10/75 15/30-70/15