Subtract 10/90 from 3/12
3/12 - 10/90 is 5/36.
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,
3/12 = 3 × 15/12 × 15 = 45/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
10/90 = 10 × 2/90 × 2 = 20/180 - Subtract the two like fractions:
45/180 - 20/180 = 45 - 20/180 = 25/180 - After reducing the fraction, the answer is 5/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/12-10/90 3/12-20/90 3/24-10/90 9/12-10/90 3/12-30/90 3/36-10/90 15/12-10/90 3/12-50/90 3/60-10/90 21/12-10/90 3/12-70/90 3/84-10/90