Subtract 10/15 from 10/40
10/40 - 10/15 is -5/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 15 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
10/40 = 10 × 3/40 × 3 = 30/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
10/15 = 10 × 8/15 × 8 = 80/120 - Subtract the two like fractions:
30/120 - 80/120 = 30 - 80/120 = -50/120 - After reducing the fraction, the answer is -5/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40-10/15 10/40-20/15 10/80-10/15 10/40-10/30 30/40-10/15 10/40-30/15 10/40-10/45 50/40-10/15 10/40-50/15 10/40-10/75 70/40-10/15 10/40-70/15