Subtract 18/45 from 1/15
1/15 - 18/45 is -1/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
1/15 = 1 × 3/15 × 3 = 3/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
18/45 = 18 × 1/45 × 1 = 18/45 - Subtract the two like fractions:
3/45 - 18/45 = 3 - 18/45 = -15/45 - After reducing the fraction, the answer is -1/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/15-18/45 1/15-36/45 1/30-18/45 1/15-18/90 3/15-18/45 1/15-54/45 1/45-18/45 5/15-18/45 1/15-90/45 1/75-18/45 7/15-18/45