Subtract 8/90 from 27/12
1st number: 2 3/12, 2nd number: 8/90
27/12 - 8/90 is 389/180.
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,
27/12 = 27 × 15/12 × 15 = 405/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
8/90 = 8 × 2/90 × 2 = 16/180 - Subtract the two like fractions:
405/180 - 16/180 = 405 - 16/180 = 389/180 - In mixed form: 229/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/12-8/90 27/12-16/90 27/24-8/90 81/12-8/90 27/12-24/90 27/36-8/90 27/12-40/90 27/60-8/90 27/12-56/90 27/84-8/90