Subtract 15/90 from 1/12
1/12 - 15/90 is -1/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
1/12 = 1 × 15/12 × 15 = 15/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
15/90 = 15 × 2/90 × 2 = 30/180 - Subtract the two like fractions:
15/180 - 30/180 = 15 - 30/180 = -15/180 - After reducing the fraction, the answer is -1/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/12-15/90 1/12-30/90 1/24-15/90 3/12-15/90 1/12-45/90 1/36-15/90 5/12-15/90 1/12-75/90 1/60-15/90 7/12-15/90 1/84-15/90