Subtract 10/90 from 18/12
1st number: 1 6/12, 2nd number: 10/90
18/12 - 10/90 is 25/18.
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,
18/12 = 18 × 15/12 × 15 = 270/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
10/90 = 10 × 2/90 × 2 = 20/180 - Subtract the two like fractions:
270/180 - 20/180 = 270 - 20/180 = 250/180 - After reducing the fraction, the answer is 25/18
- In mixed form: 17/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/12-10/90 18/12-20/90 18/24-10/90 54/12-10/90 18/12-30/90 18/36-10/90 90/12-10/90 18/12-50/90 18/60-10/90 18/12-70/90 18/84-10/90