Subtract 9/40 from 1/15
1/15 - 9/40 is -19/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
1/15 = 1 × 8/15 × 8 = 8/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
9/40 = 9 × 3/40 × 3 = 27/120 - Subtract the two like fractions:
8/120 - 27/120 = 8 - 27/120 = -19/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/15-9/40 1/15-18/40 1/30-9/40 1/15-9/80 3/15-9/40 1/15-27/40 1/45-9/40 5/15-9/40 1/15-45/40 1/75-9/40 7/15-9/40 1/15-63/40